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101. Anomalous suppression in PbPb interactions at 158 GeV/c per nucleon

Author

R. Haroutunian, G. Landaud, J.Y. Grossiord, F. Bellaiche, L. Ramello, P. Bordalo, A. Devaux, Paolo Giubellino, S. Silva, B. Cheynis, Petar Temnikov, C. Racca, A. Musso, V. Capony, Carlos Lourenco, L. Kluberg, N.S. Topilskaya, Ermanno Vercellin, Corrado Cicalo, Y. Lebornec, C. Quintans, W.L. Prado da Silva, Bruno Alessandro, C. Vale, I. Chevrot, A. Romana, G. Puddu, F. Ohlsson-Malek, João Cruz, O. Drapier, Y.K. Gavrilov, J. Fargeix, A. Marzari-Chiesa, Calin Alexa, Sergio Serci, Marek Idzik, A. Bussiere, M. Bedjidian, L. Luquin, B. Chaurand, Wladyslaw Dabrowski, C. Gerschel, N. De Marco, C. Soave, A. Guichard, M.B. Golubeva, A. Piccotti, J. Castor, D. Jouan, T. Chambon, X. Tarrago, A. B. Kurepin, F.F. Guber, Serban Constantinescu, G. L. Usai, A. De Falco, J. Astruc, P. Saturnini, N. Willis, L. Riccati, Ph. Gorodetzky, A. Masoni, Stefania Beole, G. Dellacasa, J.R. Pizzi, P. Force, S. Ramos, A. Baldit, S. Sartori, M.C. Abreu, T.L. Karavitcheva, B. Espagnon, Massimo Masera, E. Chiavassa, C. Baglin, P. Rato-Mendes, P. Macciotta, P. Guaita, Sanda Dita, François Fleuret, Mauro Gallio, V. Boldea, P. Petiau, P. Sonderegger, L. Gatignon, G. Bonazzola, S. Mourgues, Enrico Scomparin, A. Borhani, and M. Gonin

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Proton, Yield (chemistry), Quark–gluon plasma, Drell–Yan process, Atomic physics, Expected value, Nucleon, Central region, Ion
Abstract

The Drell-Yan and J ψ cross-sections measured in PbPb collisions are compared with the values extrapolated from the results obtained in proton and light ion induced reactions. While the Drell-Yan production exhibits the normal expected behaviour, the yield of J ψ in PbPb interactions is abnormally low, as it lies 9 standard deviations below the expected value. Moreover, the departure from the expected behaviour increases significantly from peripheral to central collisions.

Published
1997
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102. Azimuthal anisotropy ofπ0andηmesons in Au + Au collisions atsNN=200GeV

Author

B. Komkov, Norio Saito, M. A. L. Leite, R. Belmont, J. S. Kapustinsky, V. Babintsev, I. Tserruya, Yu. Efremenko, G. S. Kyle, James Alexander, R. Averbeck, Byung-Sik Hong, A. Bazilevsky, C. M. Camacho, Philippe Rosnet, Alexandre Lebedev, D. M. Lee, S. Dairaku, K. Kiriluk, A. Yu. Semenov, E. H. Kim, Maya Hachiya Shimomura, R. A. Soltz, C. Silvestre, V. Singh, Prashant Shukla, K. B. Lee, S. F. Pate, B. Azmoun, A. Král, Y. I. Makdisi, S. Afanasiev, R. S. Towell, K. A. Drees, S. N. White, D. Kawall, M. Grosse Perdekamp, M. E. Connors, M. Virius, Marisilvia Donadelli, V. Bumazhnov, H. Al-Bataineh, J. Newby, M. J. Tannenbaum, H. Themann, I. Garishvili, F. Wei, M. Chiu, Sung Keun Park, M. Oka, N. N. Ajitanand, H. Torii, R. Tanabe, A. K. Purwar, K. Fujiwara, K. N. Barish, Eunja Kim, C. A. Ogilvie, Kisung Lee, T. K. Hemmick, Zvi Hirsh Citron, A. Dion, J. M. Durham, Yasuo Miake, V. S. Pantuev, Kyeongpil Lee, J. Ide, Alexei Khanzadeev, C. H. Chen, Takahiro Nakamura, K. Nakano, M. Ouchida, L. Kochenda, M. Issah, K. Tanida, J. P. Wood, K. Das, D. Roach, K. M. Kijima, S. Yokkaichi, W. E. Sondheim, D. Ivanischev, A. Enokizono, P. Liebing, N. Means, Alice Mignerey, D. Hornback, Susumu Oda, Alexander Milov, I. Nakagawa, R. Luechtenborg, Y. L. Yamaguchi, E. P. Hartouni, E. Stenlund, C. Y. Chi, A. Glenn, T. Engelmore, V. Papavassiliou, K. Boyle, I. Ravinovich, P. A. Rukoyatkin, Martin Purschke, C. A. Aidala, J. Hamblen, A. Durum, J. Murata, O. Drapier, Frank Ellinghaus, Peter Christiansen, K. Watanabe, T. Ichihara, D. Winter, D. Yu Peressounko, E. R. Kinney, Takao Sakaguchi, S. Sano, D. P. Morrison, K. Shoji, C. Baumann, S. Kametani, S. Campbell, A. Taranenko, P. Tarján, A. D. Frawley, K. Yamaura, R. Pak, Y. J. Mao, C. P. Singh, E. Leitner, Kazushi Miki, Takahiro Fusayasu, B. M. Johnson, M. Bai, S. Huang, Rushan Han, Tatsuya Chujo, N. Kamihara, A. Morreale, Xingguo Li, Brajesh K. Singh, Alexander Malakhov, T. Horaguchi, Jen-Chieh Peng, A. Isupov, J. H. Kang, J. S. Haggerty, C. L. Woody, A. Berdnikov, D. Silvermyr, P. W. Stankus, K. Okada, Hongfang Liu, D. E. Fields, W. Holzmann, Z. Fraenkel, B. V. Jacak, Vladimir Samsonov, J. Sziklai, Gerd Joachim Kunde, L. S. Zolin, T. V. Moukhanova, H. W. Van Hecke, A. Drees, Brian Cole, Inkyu Park, Xiong Wang, R. K. Choudhury, M. L. Brooks, W. J. Park, Christopher Rosen, H. En'yo, Senta Greene, P. Chung, K. S. Joo, M. Kurosawa, Dong Jo Kim, S. P. Sorensen, I. Shein, S. Tarafdar, M. J. Leitch, A. T. Basye, S. Sawada, M. McCumber, K. Sakashita, E. J. Desmond, A. Yanovich, J. Ying, A. Veicht, B. Love, M. Togawa, E. Vazquez-Zambrano, Tamas Ferenc Csorgo, A. Franz, Zhiying You, B. Fadem, E. O'Brien, O. Chvala, A. Kiss, J. Park, Eva Haslum, B. Lenzi, R. Bennett, M. Kawashima, A. Rakotozafindrabe, I. V. Sourikova, B. Meredith, Henner Buesching, J. L. Nagle, Steve Edwards, K. Sedgwick, Jason Kamin, Seong H. Kim, S. Esumi, D. Sharma, A. V. Kazantsev, M. Finger, Y. Tsuchimoto, S. P. Stoll, T. L. Thomas, Y. S. Lai, John Hill, Y. Ikeda, J. Jin, R. Ichimiya, A. Deshpande, A. Datta, Jongmin Lee, E. M. Takagui, J. G. Lajoie, J. Hanks, Y. J. Kwon, Ryugo S. Hayano, H. Qu, A. G. Litvinenko, I. E. Yushmanov, S. S.E. Rosendahl, G. Bunce, Toru Sugitate, L. Tomášek, R. Vértesi, P. Mikeš, Marcus Hohlmann, Y. Riabov, D. Lynch, Ajit Kumar Mohanty, Kenta Shigaki, Hideki Hamagaki, K. Aoki, D. Jouan, T. A. Shibata, T. Sato, C. Pinkenburg, M. Nguyen, François Fleuret, I. J. Choi, A. Kravitz, G. David, K. I. Hahn, A. Taketani, A. S. Nyanin, D. S. Jumper, A. Kozlov, J. E. Frantz, Y. Watanabe, M. Gonin, D. Kotchetkov, Rachid Nouicer, M. Proissl, T. Dahms, L. A. Linden Levy, R. Seto, T. C. Awes, Kyoichiro Ozawa, T. Liška, G. Roche, I. Younus, J. S. Bok, D. Isenhower, A. Toia, T. Kempel, I. Danchev, Taku Gunji, H. Gong, J. Seele, X. He, Dong-Hun Kim, M. Naglis, F. Kajihara, C. L. Silva, Y. Aramaki, V. Peresedov, A. Sukhanov, K. Kurita, H. Pereira, Masayasu Ishihara, S. Butsyk, S. Bathe, Agneta Oskarsson, S. Zhou, J. Koster, M. Wysocki, S. D. Rolnick, Y. Morino, H. Masui, A. A. Bickley, Minghui Liu, Y. Berdnikov, Y. Akiba, M. Mishra, S. Nagamiya, Vaclav Vrba, Klaus Johannes Reygers, Rui Wei, M. Heffner, Kenneth Francis Read, Tadaaki Isobe, P. L. McGaughey, Y. Fukao, Y. Nakamiya, T. Hester, G. Baksay, B. Sahlmueller, Y. J. Kim, F. Matathias, Kensuke Homma, E. Richardson, P. Constantin, N. A. Sparks, B. Bassalleck, M. Konno, J. T. Mitchell, R. Seidl, Vladislav Manko, M. Slunečka, S. Belikov, N. Grau, C. Vale, M. I. Nagy, Motoi Inaba, R. M. Wright, Mate Csanad, D. Watanabe, R. P. Pisani, M. D. Malik, E. Vznuzdaev, Charles Maguire, Y. Onuki, E. Kistenev, H. Pei, Jan Rak, R. Lacey, Johannes Peter Wessels, R. Granier de Cassagnac, W. A. Zajc, A. Adare, V. Baublis, A. Denisov, V. Cianciolo, Sergey Fokin, Beomkyu Kim, H. A. Gustafsson, Wei Xie, Y. Tanaka, E. Mannel, K. Karatsu, C. Zhang, L. Baksay, P. Ružička, Anne Marie Sickles, Viktor Riabov, G. R. Young, K. S. Sim, R. Yang, K. Imai, M. Rosati, A. A. Vinogradov, Jiangyong Jia, Y. Goto, O. Dietzsch, E. T. Atomssa, H. Valle, Dipanwita Dutta, and Julia Velkovska

Subjects
Physics, Nuclear and High Energy Physics, Range (particle radiation), Meson, 010308 nuclear & particles physics, Elliptic flow, 01 natural sciences, Nuclear physics, Azimuth, Viscosity, 0103 physical sciences, Transverse momentum, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider, Anisotropy
Abstract

The azimuthal anisotropy coefficients v2 and v4 of p 0 and. mesons are measured in Au + Au collisions at root s(NN) = 200 GeV as a function of transverse momentum p(T) (1-14 GeV/c) and centrality. The extracted v(2) coefficients are found to be consistent between the two meson species over the measured p(T) range. The ratio of v(4)/v(2)(2) for pi(0) mesons is found to be independent of p(T) for 1- 9 GeV/c, implying a lack of sensitivity of the ratio to the change of underlying physics with p(T). Furthermore, the ratio of v(4)/v(2)(2) is systematically larger in central collisions, which may reflect the combined effects of fluctuations in the initial collision geometry and finite viscosity in the evolving medium.

Published
2013
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103. Quadrupole Anisotropy in Dihadron Azimuthal Correlations in Centrald+AuCollisions atsNN=200 GeV

Author

H. Qu, Hideki Hamagaki, K. Aoki, G. David, K. I. Hahn, Takahiro Fusayasu, Masamichi Ishihara, D. Silvermyr, W. J. Park, T. L. Thomas, Ryugo S. Hayano, Y. Riabov, Kenta Shigaki, Maya Hachiya Shimomura, Y. I. Makdisi, Christopher Rosen, A. Yanovich, Minghui Liu, M. Heffner, Kenneth Francis Read, M. Nguyen, K. Watanabe, K. Shoji, Beomkyu Kim, A. S. Nyanin, T. Ichihara, T. Horaguchi, P. W. Stankus, M. J. Tannenbaum, Jen-Chieh Peng, Charles Maguire, Hongfang Liu, D. E. Fields, H. Torii, Rachid Nouicer, M. Proissl, Inkyu Park, D. Kawall, H. Themann, B. V. Jacak, Xiong Wang, Z. Conesa del Valle, C. Baumann, T. Kempel, E. Kistenev, Y. J. Kwon, C. P. Singh, S. Rembeczki, M. McCumber, Gary Grim, Dong Jo Kim, K. V. Dharmawardane, J. Hanks, B. M. Johnson, Dennis Perepelitsa, P. Lichtenwalner, R. J. Petti, K. S. Joo, Gerd Joachim Kunde, Sung Keun Park, S. P. Sorensen, A. Veicht, Alice Mignerey, N. Apadula, K. S. Sim, N. N. Ajitanand, I. Shein, L. D'Orazio, J. Sziklai, O. Chvala, H. A. Gustafsson, S. Esumi, D. Sharma, I. Ravinovich, Takahiro Nakamura, R. Yang, R. Ichimiya, Brian Cole, M. Ouchida, D. McGlinchey, S. Taneja, J. Newby, K. A. Drees, Takao Sakaguchi, K. Sedgwick, M. Bai, Susumu Oda, K. Imai, P. Ružička, J. G. Lajoie, N. Means, Ajit Kumar Mohanty, A. Durum, A. D. Frawley, D. Hornback, T. A. Shibata, C. L. Silva, T. Sato, Viktor Riabov, K. Das, S. Huang, K. Yamaura, A. Taranenko, D. Isenhower, A. Toia, W. Holzmann, I. J. Choi, A. Kravitz, Kazushi Miki, Zhiying You, M. Gonin, R. Bennett, Brajesh K. Singh, M. Kawashima, Y. Onuki, Alexander Milov, I. Nakagawa, T. Engelmore, Vladimir Samsonov, O. Drapier, Frank Ellinghaus, M. Finger, Jan Rak, E. R. Kinney, R. Lacey, Aaron Angerami, D. P. Morrison, S. Campbell, W. A. Zajc, R. Granier de Cassagnac, A. Adare, Tatsuya Chujo, A. Sukhanov, K. Kurita, I. Tserruya, B. Azmoun, Y. J. Mao, A. Král, Yu. Efremenko, V. Baublis, V. Singh, B. Meredith, A. Denisov, V. Cianciolo, H. Pereira, Sergey Fokin, D. Watanabe, Tamas Ferenc Csorgo, A. Glenn, John Hill, M. Oka, Eunja Kim, M. D. Malik, M. Kurosawa, J. L. Nagle, Y. Nakamiya, D. Lynch, E. Vznuzdaev, K. S. Lee, Y. Morino, K. Karatsu, Toru Sugitate, G. Baksay, P. Liebing, Anne Marie Sickles, C. Silvestre, Martin Purschke, C. A. Aidala, Marisilvia Donadelli, V. Bumazhnov, R. Tanabe, A. Enokizono, J. Jin, A. Morreale, P. Chung, E. M. Takagui, R. S. Towell, R. Pak, Z. Fraenkel, I. Garishvili, B. Sahlmueller, F. Wei, R. K. Choudhury, Rushan Han, Y. J. Kim, François Fleuret, G. R. Young, S. Tarafdar, M. Naglis, J. T. Mitchell, C. Y. Chi, Jongmin Lee, R. Seidl, Vladislav Manko, S. N. White, A. Datta, Eva Haslum, Deepa Thomas, Taku Gunji, H. Gong, J. Seele, S. Belikov, F. Kajihara, Zvi Hirsh Citron, A. Taketani, C. Vale, D. S. Jumper, T. Dahms, K. Nakano, A. Kiss, X. He, Y. Tanaka, A. Deshpande, F. Matathias, Kensuke Homma, W. E. Sondheim, E. Richardson, E. Mannel, S. Dairaku, S. Butsyk, Y. Aramaki, Robert Vertesi, B. Bassalleck, Henner Buesching, D. Ivanischev, M. Konno, S. Zhou, K. B. Lee, A. Dion, J. Koster, M. I. Nagy, K. Boyle, Johannes Peter Wessels, M. Virius, Manabu Togawa, Steve Edwards, Y. Watanabe, S. D. Rolnick, D. Roach, K. M. Kijima, H. Masui, H. J. Moon, C. H. Chen, L. Baksay, I. Younus, Xingguo Li, H. Pei, Marcus Hohlmann, M. Slunečka, P. L. McGaughey, K. N. Barish, L. A. Linden Levy, S. Sano, M. L. Brooks, B. Love, Senta Greene, R. Seto, I. Danchev, A. T. Basye, B. Fadem, E. O'Brien, C. L. Woody, R. A. Soltz, M. Grosse Perdekamp, A. Caringi, O. Dietzsch, M. E. Connors, S. Bathe, Agneta Oskarsson, E. T. Atomssa, H. Valle, Y. Akiba, A. V. Kazantsev, S. Nagamiya, Dipanwita Dutta, Vaclav Vrba, Klaus Johannes Reygers, K. Tanida, L. Tomášek, T. Jones, Rui Wei, Peter Christiansen, Julia Velkovska, K. Fujiwara, I. V. Sourikova, D. Winter, Y. L. Yamaguchi, M. Rosati, D. Yu Peressounko, H. W. Van Hecke, T. C. Awes, Kyoichiro Ozawa, T. Liška, J. S. Bok, Jiangyong Jia, Y. Goto, Jun Kikuchi, T. Murakami, D. Kleinjan, S. Sawada, J. Ying, A. Franz, G. S. Kyle, Y. Fukao, James Alexander, T. Hester, R. Averbeck, Byung-Sik Hong, A. Bazilevsky, S. Yokkaichi, Dmitry Blau, N. Grau, Alexandre Lebedev, E. J. Desmond, Y. Ikeda, D. M. Lee, E. Vazquez-Zambrano, C. Pinkenburg, Aram Kim, Motoi Inaba, G. Roche, R. M. Wright, J. H. Kang, J. S. Haggerty, M. Kasai, Y. Tsuchimoto, V. S. Pantuev, Y. Iwanaga, C. Oakley, A. Drees, Y. S. Lai, I. E. Yushmanov, Alexei Khanzadeev, K. Sakashita, J. Hamblen, E. Stenlund, Jason Kamin, J. B. Choi, M. Csanad, S. P. Stoll, M. Nihashi, S. S.E. Rosendahl, G. Bunce, K. Okada, D. Jouan, H. En'yo, M. Chiu, M. J. Leitch, C. A. Ogilvie, T. K. Hemmick, J. M. Durham, Yasuo Miake, L. Kochenda, M. Issah, J. H. Bhom, R. P. Pisani, T. V. Moukhanova, Prashant Shukla, S. F. Pate, J. E. Frantz, J. Murata, Ke. Nakamura, H. Al-Bataineh, V. Papavassiliou, M. K. Dayananda, M. Wysocki, B. Komkov, Norio Saito, Tsutomu Mibe, M. A. L. Leite, R. Belmont, J. S. Kapustinsky, V. Babintsev, X. Jiang, and S. W. Nam

Subjects
Physics, Particle physics, Large Hadron Collider, 010308 nuclear & particles physics, Hadron, Elliptic flow, General Physics and Astronomy, Parton, 01 natural sciences, Nuclear physics, 0103 physical sciences, Quadrupole, Multiplicity (chemistry), Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider, Anisotropy
Abstract

The PHENIX collaboration at the Relativistic Heavy Ion Collider (RHIC) reports measurements of azimuthal dihadron correlations near midrapidity in d + Au collisions at root s(NN) = 200 GeV. These measurements complement recent analyses by experiments at the Large Hadron Collider (LHC) involving central p + Pb collisions at root s(NN) = 5.02 TeV, which have indicated strong anisotropic long-range correlations in angular distributions of hadron pairs. The origin of these anisotropies is currently unknown. Various competing explanations include parton saturation and hydrodynamic flow. We observe qualitatively similar, but larger, anisotropies in d + Au collisions at RHIC compared to those seen in p + Pb collisions at the LHC. The larger extracted upsilon(2) values in d + Au are consistent with expectations from hydrodynamic calculations owing to the larger expected initial-state eccentricity compared with that from p + Pb collisions. When both are divided by an estimate of the initial-state eccentricity the scaled anisotropies follow a common trend with multiplicity that may extend to heavy ion data at RHIC and the LHC, where the anisotropies are widely thought to arise from hydrodynamic flow.

Published
2013
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104. Nuclear Modification ofψ′,χc, andJ/ψProduction ind+AuCollisions atsNN=200 GeV

Author

K. Watanabe, A. V. Kazantsev, M. Gonin, Maya Hachiya Shimomura, Y. I. Makdisi, M. Chiu, C. A. Ogilvie, Charles Maguire, T. K. Hemmick, J. M. Durham, Yasuo Miake, K. Shoji, L. Kochenda, M. Issah, J. Newby, M. J. Tannenbaum, E. Kistenev, H. Torii, L. Tomášek, A. Sukhanov, K. Kurita, B. Azmoun, Y. J. Mao, A. Král, P. Lichtenwalner, T. Murakami, D. Kawall, X. He, H. A. Gustafsson, H. Pereira, D. Hornback, T. Horaguchi, S. Rembeczki, P. W. Stankus, Y. Nakamiya, D. Lynch, H. Themann, Y. Morino, K. S. Sim, V. S. Pantuev, A. Taranenko, Y. Aramaki, I. Ravinovich, T. C. Awes, Kazushi Miki, P. Ružička, K. A. Drees, B. Meredith, M. Oka, Robert Vertesi, Kyoichiro Ozawa, T. Liška, J. S. Bok, A. Dion, M. I. Nagy, G. Baksay, S. Sawada, K. S. Lee, Jun Kikuchi, Y. Tanaka, Brajesh K. Singh, R. Pak, E. Mannel, Alice Mignerey, J. Ying, A. Franz, Viktor Riabov, John Hill, R. Yang, Johannes Peter Wessels, M. Nihashi, Marisilvia Donadelli, V. Bumazhnov, L. D'Orazio, Toru Sugitate, Gerd Joachim Kunde, Aaron Angerami, M. Bai, S. Taneja, C. Baumann, P. Liebing, J. Koster, M. Slunečka, K. S. Joo, S. P. Sorensen, I. Shein, H. J. Moon, P. L. McGaughey, D. Watanabe, W. A. Zajc, S. Tarafdar, M. Ouchida, L. Baksay, François Fleuret, K. Imai, J. Hamblen, O. Chvala, M. D. Malik, E. Vznuzdaev, V. Baublis, B. Sahlmueller, M. K. Dayananda, N. Apadula, A. Denisov, Takao Sakaguchi, C. P. Singh, K. Karatsu, K. Sedgwick, K. Das, H. Pei, V. Cianciolo, Takahiro Fusayasu, M. Wysocki, Eva Haslum, Y. J. Kim, N. Means, R. P. Pisani, D. Silvermyr, R. Tanabe, A. D. Frawley, J. G. Lajoie, J. E. Frantz, Anne Marie Sickles, A. Deshpande, Senta Greene, Prashant Shukla, Beomkyu Kim, W. J. Park, Christopher Rosen, S. Esumi, Sergey Fokin, Zhiying You, A. Yanovich, R. Bennett, D. Sharma, B. M. Johnson, S. F. Pate, I. J. Choi, M. Kawashima, Ke. Nakamura, A. T. Basye, R. Ichimiya, H. Masui, S. N. White, Deepa Thomas, J. Murata, S. Huang, F. Matathias, A. Kravitz, Masamichi Ishihara, K. B. Lee, H. Al-Bataineh, M. Finger, T. Kempel, Zvi Hirsh Citron, Dennis Perepelitsa, Martin Purschke, K. Nakano, Gary Grim, Jongmin Lee, C. A. Aidala, Kensuke Homma, W. Holzmann, E. Richardson, Minghui Liu, B. Fadem, E. O'Brien, R. J. Petti, W. E. Sondheim, Y. Fukao, K. V. Dharmawardane, R. A. Soltz, Dmitry Blau, V. Papavassiliou, D. Ivanischev, Y. Watanabe, Rushan Han, K. Boyle, M. Heffner, Kenneth Francis Read, T. Ichihara, O. Dietzsch, M. Grosse Perdekamp, E. T. Atomssa, G. R. Young, H. Valle, E. J. Desmond, T. L. Thomas, D. Roach, K. M. Kijima, T. Hester, Vladimir Samsonov, A. Morreale, I. Younus, M. E. Connors, A. Taketani, Z. Fraenkel, Dipanwita Dutta, K. Okada, D. S. Jumper, Y. Onuki, B. Bassalleck, E. Vazquez-Zambrano, T. Dahms, R. K. Choudhury, J. Sziklai, Jan Rak, S. Dairaku, H. Qu, M. Kasai, Ryugo S. Hayano, Xingguo Li, B. Love, Julia Velkovska, M. Konno, Y. Tsuchimoto, R. Lacey, Y. Iwanaga, Tamas Ferenc Csorgo, H. En'yo, R. Granier de Cassagnac, Hideki Hamagaki, K. Aoki, G. David, M. Rosati, K. I. Hahn, J. T. Mitchell, I. E. Yushmanov, J. L. Nagle, Y. Riabov, Kenta Shigaki, M. Nguyen, Alexei Khanzadeev, Brian Cole, A. Adare, N. Grau, R. Seidl, Vladislav Manko, M. J. Leitch, E. Stenlund, J. B. Choi, M. Kurosawa, S. Belikov, A. S. Nyanin, K. Tanida, T. Jones, Peter Christiansen, Motoi Inaba, R. M. Wright, Rachid Nouicer, J. H. Bhom, C. Vale, Jiangyong Jia, M. Proissl, T. V. Moukhanova, D. Winter, M. Naglis, Y. Goto, D. Yu Peressounko, C. L. Woody, D. Kleinjan, A. Caringi, Y. J. Kwon, R. Seto, I. V. Sourikova, I. Danchev, J. Jin, E. M. Takagui, K. N. Barish, R. S. Towell, I. Garishvili, F. Wei, S. Sano, C. Y. Chi, M. L. Brooks, X. Jiang, S. W. Nam, K. Fujiwara, Y. L. Yamaguchi, G. S. Kyle, K. Sakashita, Jason Kamin, M. Csanad, S. P. Stoll, S. S.E. Rosendahl, G. Bunce, D. Jouan, Aram Kim, C. Oakley, A. Drees, James Alexander, H. W. Van Hecke, S. Bathe, Agneta Oskarsson, R. Averbeck, Byung-Sik Hong, A. Bazilevsky, Y. Akiba, S. Nagamiya, Vaclav Vrba, Klaus Johannes Reygers, Alexandre Lebedev, Rui Wei, D. M. Lee, A. Kiss, Sung Keun Park, Henner Buesching, N. N. Ajitanand, Steve Edwards, B. Komkov, Takahiro Nakamura, D. McGlinchey, Susumu Oda, J. H. Kang, A. Durum, Marcus Hohlmann, J. S. Haggerty, Norio Saito, Tsutomu Mibe, L. A. Linden Levy, M. A. L. Leite, Catherine Micaela Silvestre, K. Yamaura, R. Belmont, Hongfang Liu, D. E. Fields, J. S. Kapustinsky, V. Babintsev, Y. S. Lai, B. V. Jacak, Jen-Chieh Peng, Y. Ikeda, M. McCumber, C. Pinkenburg, Inkyu Park, G. Roche, Xiong Wang, Z. Conesa del Valle, J. Hanks, Dong Jo Kim, S. Yokkaichi, A. Veicht, Alexander Milov, I. Nakagawa, T. Engelmore, O. Drapier, Frank Ellinghaus, E. R. Kinney, D. P. Morrison, S. Campbell, Tatsuya Chujo, I. Tserruya, Yu. Efremenko, V. Singh, A. Glenn, Eunja Kim, M. Virius, Manabu Togawa, C. H. Chen, A. Enokizono, P. Chung, A. Datta, Taku Gunji, H. Gong, J. Seele, F. Kajihara, S. Butsyk, S. Zhou, S. D. Rolnick, Ajit Kumar Mohanty, T. A. Shibata, C. L. Silva, T. Sato, D. Isenhower, and A. Toia

Subjects
Physics, Meson, 010308 nuclear & particles physics, General Physics and Astronomy, 01 natural sciences, 7. Clean energy, Super Proton Synchrotron, Charged particle, Nuclear physics, Deuterium, 0103 physical sciences, Yield ratio, High Energy Physics::Experiment, Multiplicity (chemistry), Atomic physics, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider
Abstract

We present results for three charmonia states (psi' chi(c), and J/ psi) in d + Au collisions at vertical bar y vertical bar < 0.35 and root s(NN) = 200 GeV. We find that the modification of the psi' yield relative to that of the J/ psi scales approximately with charged particle multiplicity at midrapidity across p + A, d + Au, and A + A results from the Super Proton Synchrotron and the Relativistic Heavy Ion Collider. In large-impact-parameter collisions we observe a similar suppression for the psi' and J/ psi, while in small-impact-parameter collisions the more weakly bound psi' is more strongly suppressed. Owing to the short time spent traversing the Au nucleus, the larger psi' suppression in central events is not explained by an increase of the nuclear absorption owing to meson formation time effects.

Published
2013
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105. Spectra and ratios of identified particles in Au+Au andd+Au collisions atsNN=200GeV

Author

N. Apadula, B. Azmoun, A. Král, M. Oka, P. Liebing, S. Esumi, D. Sharma, R. Ichimiya, P. Tarján, Y. J. Mao, Martin Purschke, C. A. Aidala, Y. Fukao, I. Tserruya, A. K. Purwar, K. Fujiwara, Charles Maguire, Maya Hachiya Shimomura, A. Morreale, D. Kawall, C. Silvestre, K. Karatsu, Z. Fraenkel, Gary Grim, Yu. Efremenko, R. K. Choudhury, Jongmin Lee, Y. L. Yamaguchi, K. V. Dharmawardane, Anne Marie Sickles, J. H. Kang, Y. I. Makdisi, V. Singh, H. Themann, J. S. Haggerty, T. Hester, V. S. Pantuev, D. Lynch, E. Leitner, A. Taketani, G. S. Kyle, James Alexander, Marisilvia Donadelli, V. Bumazhnov, O. Dietzsch, M. I. Nagy, D. Watanabe, M. D. Malik, E. Vznuzdaev, N. A. Sparks, R. S. Towell, I. Garishvili, F. Wei, K. N. Barish, S. Nam, D. S. Jumper, R. Tanabe, E. T. Atomssa, H. Valle, M. K. Dayananda, M. Wysocki, Ajit Kumar Mohanty, T. A. Shibata, C. L. Silva, M. J. Tannenbaum, S. Sano, T. Sato, Dipanwita Dutta, A. Glenn, G. R. Young, H. W. Van Hecke, H. Torii, T. Dahms, E. Kistenev, P. Lichtenwalner, H. Qu, A. Kim, Hideki Hamagaki, K. Aoki, Y. S. Lai, R. Pak, N. Kamihara, N. Grau, J. Murata, Eunja Kim, Julia Velkovska, A. Yu. Semenov, S. Dairaku, S. Rembeczki, K. A. Drees, S. N. White, Deepa Thomas, Zvi Hirsh Citron, R. Averbeck, Byung-Sik Hong, A. Bazilevsky, G. David, A. Kiss, Kyeongpil Lee, S. P. Sorensen, M. Rosati, R. Vértesi, Hongfang Liu, D. E. Fields, B. V. Jacak, Senta Greene, A. T. Basye, K. Nakano, J. Hamblen, Aaron Angerami, Tadaaki Isobe, J. P. Wood, Alexander Milov, I. Nakagawa, R. Luechtenborg, T. Engelmore, Beomkyu Kim, K. Boyle, J. Ide, Henner Buesching, Gerd Joachim Kunde, Wei Xie, M. Ouchida, N. Means, Steve Edwards, M. Virius, K. Okada, Rushan Han, Motoi Inaba, M. McCumber, W. A. Zajc, O. Drapier, Frank Ellinghaus, B. Fadem, E. O'Brien, I. Shein, R. M. Wright, Y. Tanaka, W. E. Sondheim, D. Ivanischev, Mate Csanad, C. M. Camacho, Prashant Shukla, S. F. Pate, Philippe Rosnet, Alice Mignerey, K. S. Sim, E. R. Kinney, D. P. Morrison, M. L. Brooks, K. Watanabe, V. Baublis, A. Denisov, L. D'Orazio, H. En'yo, E. Mannel, S. Yokkaichi, A. A. Vinogradov, Ke. Nakamura, S. Campbell, Vladimir Samsonov, V. Cianciolo, M. J. Leitch, P. A. Rukoyatkin, T. Ichihara, R. A. Soltz, C. H. Chen, C. Oakley, A. Drees, K. Shoji, H. Al-Bataineh, O. Chvala, J. Hanks, Alexandre Lebedev, Sergey Fokin, M. Nihashi, Marcus Hohlmann, B. Love, Takahiro Fusayasu, Tatsuya Chujo, Jiangyong Jia, Y. Goto, H. J. Moon, L. Baksay, T. Horaguchi, P. L. McGaughey, P. W. Stankus, T. L. Thomas, Y. Ikeda, D. Isenhower, Jen-Chieh Peng, Sung Keun Park, D. M. Lee, I. Ravinovich, K. Das, M. Grosse Perdekamp, Seong H. Kim, Alexander Malakhov, C. Y. Chi, A. Toia, N. N. Ajitanand, L. A. Linden Levy, K. Sakashita, Takao Sakaguchi, E. P. Hartouni, H. Pei, J. E. Frantz, Tamas Ferenc Csorgo, M. E. Connors, Y. J. Kwon, Ryugo S. Hayano, K. Sedgwick, M. Bai, R. P. Pisani, J. G. Lajoie, Inkyu Park, D. Kleinjan, J. L. Nagle, Xiong Wang, V. Papavassiliou, K. Kiriluk, Z. Conesa del Valle, H. A. Gustafsson, Takahiro Nakamura, A. D. Frawley, Y. Riabov, D. Silvermyr, Kenta Shigaki, Alexei Khanzadeev, Dong Jo Kim, C. Pinkenburg, S. Bathe, T. Murakami, D. McGlinchey, C. Baumann, A. G. Litvinenko, M. Nguyen, R. Yang, I. J. Choi, A. Kravitz, E. H. Kim, Agneta Oskarsson, C. Zhang, Susumu Oda, A. Deshpande, Jason Kamin, E. Stenlund, A. Dion, K. B. Lee, S. Kametani, L. S. Zolin, Taku Gunji, H. Gong, J. Seele, X. Jiang, A. Veicht, G. Roche, S. Huang, J. B. Choi, S. P. Stoll, A. S. Nyanin, W. J. Park, T. Kempel, F. Kajihara, P. Ružička, Y. Berdnikov, Y. Akiba, A. Durum, C. P. Singh, Zhiying You, K. Tanida, Rachid Nouicer, D. Kotchetkov, M. Proissl, Johannes Peter Wessels, R. Bennett, Christopher Rosen, A. V. Kazantsev, Dong-Hun Kim, S. Taneja, M. Mishra, W. Holzmann, M. Kawashima, S. Nagamiya, S. S.E. Rosendahl, T. Jones, Peter Christiansen, B. M. Johnson, G. Bunce, Viktor Riabov, K. Yamaura, M. Finger, A. Kozlov, D. Winter, R. Seto, A. Yanovich, C. L. Woody, A. Berdnikov, Vaclav Vrba, Klaus Johannes Reygers, D. Yu Peressounko, J. H. Bhom, R. J. Petti, K. Imai, S. Butsyk, Rui Wei, L. Tomášek, D. Jouan, A. Isupov, T. V. Moukhanova, D. Roach, P. Mikeš, S. Zhou, I. Danchev, S. Sawada, Dmitry Blau, Y. Onuki, X. He, K. M. Kijima, J. Sziklai, S. D. Rolnick, J. Ying, Jan Rak, A. Franz, M. Chiu, E. J. Desmond, B. Meredith, Y. Aramaki, V. Peresedov, R. Lacey, C. A. Ogilvie, M. Togawa, Kisung Lee, T. K. Hemmick, E. Vazquez-Zambrano, J. Park, T. C. Awes, R. Granier de Cassagnac, Kyoichiro Ozawa, T. Liška, J. M. Durham, Yasuo Miake, J. S. Bok, A. Rakotozafindrabe, Brian Cole, J. Koster, A. Adare, A. Caringi, Jun Kikuchi, M. Kurosawa, Y. Watanabe, M. Kasai, Y. Tsuchimoto, Y. Iwanaga, B. Komkov, John Hill, Xingguo Li, L. Kochenda, M. Issah, I. E. Yushmanov, H. Masui, Toru Sugitate, A. Enokizono, P. Chung, Norio Saito, I. Younus, Tsutomu Mibe, M. Gonin, Minghui Liu, A. A. Bickley, M. Heffner, Kenneth Francis Read, M. A. L. Leite, A. Datta, I. V. Sourikova, François Fleuret, A. Sukhanov, K. Kurita, H. Pereira, R. Belmont, J. S. Kapustinsky, V. Babintsev, Y. Morino, J. Jin, E. M. Takagui, M. Naglis, Masayasu Ishihara, F. Matathias, Kensuke Homma, E. Richardson, P. Constantin, K. I. Hahn, B. Bassalleck, M. Konno, Y. Nakamiya, G. Baksay, B. Sahlmueller, Y. J. Kim, J. T. Mitchell, R. Seidl, S. Tarafdar, Vladislav Manko, M. Slunečka, S. Belikov, Eva Haslum, B. Lenzi, C. Vale, S. Afanasiev, J. Newby, D. Hornback, A. Taranenko, Kazushi Miki, Brajesh K. Singh, and K. S. Joo

Subjects
Physics, Nuclear and High Energy Physics, Nuclear Theory, Hadron, Spectral line, Nuclear physics, Pion, Deuterium, Transverse momentum, High Energy Physics::Experiment, Atomic physics, Nuclear Experiment, Relativistic Heavy Ion Collider, Nucleon, Bar (unit)
Abstract

The transverse momentum (p(T)) spectra and ratios of identified charged hadrons (pi(+/-), K-+/-, p, (p) over bar) produced in root s(NN) = 200 GeV Au + Au and d + Au collisions are reported in five different centrality classes for each collision species. The measurements of pions and protons are reported up to p(T) = 6 GeV/c (5 GeV/c), and the measurements of kaons are reported up to p(T) = 4 GeV/c (3.5 GeV/c) in Au + Au (d + Au) collisions. In the intermediate p(T) region, between 2 and 5 GeV/c, a significant enhancement of baryon-to-meson ratios compared to those measured in p + p collisions is observed. This enhancement is present in both Au + Au and d + Au collisions and increases as the collisions become more central. We compare a class of peripheral Au + Au collisions with a class of central d + Au collisions which have a comparable number of participating nucleons and binary nucleon-nucleon collisions. The p(T)-dependent particle ratios for these classes display a remarkable similarity, which is then discussed.

Published
2013
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106. Inclusive cross section and single transverse spin asymmetry for very forward neutron production in polarizedp+pcollisions ats=200 GeV

Author

P. Tarján, Ryugo S. Hayano, M. Rosati, Maya Hachiya Shimomura, Vladimir Samsonov, Y. I. Makdisi, Y. Riabov, Kenta Shigaki, M. Nguyen, A. Yu. Semenov, J. Gosset, A. A. Vinogradov, A. S. Nyanin, Rachid Nouicer, Jiangyong Jia, Y. Goto, M. J. Tannenbaum, K. S. Sim, H. Torii, V. Dzhordzhadze, C. L. Woody, A. Berdnikov, S. Afanasiev, Y. Kwon, D. Mukhopadhyay, S. Rembeczki, A. Ster, Senta Greene, R. Yang, Tamas Ferenc Csorgo, S. Yokkaichi, A. T. Basye, M. I. Nagy, M. Issah, I. V. Sourikova, B. Meredith, Takafumi Niida, John Hill, B. Fadem, E. O'Brien, J. L. Nagle, M. Ouchida, N. Means, K. Imai, J. Asai, J. Newby, Shingo Sakai, M. Wysocki, A. A. Bickley, M. D. Malik, E. Vznuzdaev, Toru Sugitate, Y. Fukao, Minghui Liu, H. Pei, O. Dietzsch, H. Iinuma, Y. J. Mao, T. Horaguchi, Takao Sakaguchi, R. A. Soltz, H. Borel, E. T. Atomssa, H. Valle, J. H. Kang, K. B. Lee, C. Klein-Boesing, M. Heffner, Kenneth Francis Read, A. D. Frawley, Dipanwita Dutta, T. Hester, François Fleuret, J. S. Haggerty, D. Hornback, A. P.T. Palounek, R. Pak, S. Bathe, Julia Velkovska, T. Ichihara, S. Huang, M. Grosse Perdekamp, Anne Marie Sickles, N. Kamihara, W. Holzmann, Marisilvia Donadelli, V. Bumazhnov, Takahiro Fusayasu, A. Adare, A. Taranenko, Kazushi Miki, Alexander Malakhov, Y. Nakamiya, A. Hadj Henni, G. R. Young, S. Sawada, D. Silvermyr, Agneta Oskarsson, Y. Berdnikov, Y. Akiba, M. Mishra, S. Nagamiya, K. A. Drees, Brajesh K. Singh, V-N. Tram, N. Grau, Taku Gunji, H. Gong, J. Seele, A. Drees, Vaclav Vrba, H. A. Gustafsson, Klaus Johannes Reygers, L. S. Zolin, R. Tanabe, D. Layton, W. J. Park, D. Winter, D. Yu Peressounko, Y. Onuki, F. Kajihara, J. Ying, A. Franz, Jan Rak, R. Lacey, C. Zhang, P. D. Barnes, A. Yanovich, G. Baksay, Y. Tanaka, W. C. Chang, K. Sakashita, Motoi Inaba, Beomkyu Kim, E. Mannel, Y. S. Lai, K. O. Eyser, A. K. Purwar, K. Fujiwara, R. Granier de Cassagnac, R. Vértesi, N. N. Ajitanand, Wei Xie, D. Roach, Mate Csanad, C. M. Camacho, Prashant Shukla, S. Butsyk, P. Ružička, S. F. Pate, Y. Ikeda, H. Al-Bataineh, Jason Kamin, S. N. White, K. M. Kijima, J. G. Boissevain, Tadaaki Isobe, S. P. Stoll, Rushan Han, X. He, S. Zhou, A. Baldisseri, S. D. Rolnick, L. Baksay, Viktor Riabov, Zvi Hirsh Citron, V. Peresedov, K. Nakano, Eva Haslum, B. Lenzi, K. N. Barish, W. E. Sondheim, S. S.E. Rosendahl, B. Sahlmueller, P. L. McGaughey, G. Bunce, D. Ivanischev, V. Papavassiliou, J. L. Charvet, Charles Maguire, C. Pinkenburg, K. Das, David D'Enterria, K. Boyle, P. A. Rukoyatkin, H. W. Van Hecke, J. T. Mitchell, M. Chiu, A. Churyn, E. P. Hartouni, D. Jouan, Kiyoshi Tanida, M. Stepanov, G. Roche, P. Chung, J. Koster, R. Seidl, A. V. Kazantsev, Vladislav Manko, H. Qu, E. Kistenev, Xingguo Li, Takahiro Nakamura, J. Imrek, W. A. Zajc, M. Slunečka, M. Gonin, L. Tomášek, A. Kiss, V. Baublis, A. Denisov, J. E. Frantz, Ajit Kumar Mohanty, V. Cianciolo, T. A. Shibata, C. A. Ogilvie, T. Sato, T. K. Hemmick, Y. Tomita, Sergey Fokin, Henner Buesching, Alexei Khanzadeev, Yasuo Miake, S. Batsouli, H. Masui, A. K. Dubey, Johannes Peter Wessels, D. Isenhower, A. Toia, L. Kochenda, S. Belikov, L. Mašek, E. Stenlund, T. C. Awes, Kyoichiro Ozawa, T. Liška, Jun Kikuchi, Susumu Oda, B. Love, V. S. Pantuev, A. Sukhanov, K. Kurita, H. Pereira, Marcus Hohlmann, C. Vale, A. Durum, A. G. Litvinenko, T. V. Moukhanova, Hideki Hamagaki, K. Aoki, B. S. Chang, A. Kozlov, R. Seto, K. Haruna, Y. Morino, E. J. Desmond, Catherine Micaela Silvestre, P. Mikeš, K. Yamaura, K. Okada, G. David, M. Togawa, J. Park, A. Rakotozafindrabe, E. H. Kim, H. En'yo, J. Klay, Y. Tsuchimoto, F. Matathias, M. J. Leitch, I. E. Yushmanov, D. E. Fields, Kensuke Homma, B. V. Jacak, M. L. Brooks, S. P. Sorensen, P. Constantin, S. Chernichenko, I. Ravinovich, M. McCumber, A. Deshpande, B. Bassalleck, H. Liu, K. Shoji, M. Konno, Seong H. Kim, M. Bai, Y. Watanabe, I. Younus, P. W. Stankus, J. G. Lajoie, A. Soldatov, Tae-Yeon Lee, M. Naglis, Martin Purschke, C. L. Silva, Y. L. Yamaguchi, B. Komkov, I. J. Choi, A. Kravitz, Masayasu Ishihara, C. A. Aidala, R. Bennett, F. Staley, D. Kawall, H. Themann, Norio Saito, M. A. L. Leite, J. Murata, Gerd Joachim Kunde, M. Finger, S. Dairaku, A. Morreale, I. Shein, K. Sedgwick, J. S. Kapustinsky, Z. Fraenkel, O. Zaudtke, V. Babintsev, T. Kempel, Dong-Hun Kim, G. S. Kyle, M. Virius, James Alexander, R. Averbeck, R. K. Choudhury, Byung-Sik Hong, A. Bazilevsky, B. Azmoun, A. Král, Philippe Rosnet, C. Baumann, S. Kametani, M. J. Kweon, C. P. Singh, Alexandre Lebedev, B. M. Johnson, D. M. Lee, A. Isupov, C. Suire, J. Sziklai, K. Kiriluk, Brian Cole, M. Kurosawa, M. Oka, A. Dion, A. Glenn, A. Enokizono, P. Liebing, J. Jin, E. M. Takagui, K. S. Joo, R. S. Towell, I. Garishvili, F. Wei, Laurent Bernard Aphecetche, S. Esumi, D. Sharma, R. Ichimiya, D. Lynch, A. Taketani, C. Y. Chi, V. L. Rykov, T. Dahms, Alexander Milov, I. Nakagawa, T. Engelmore, O. Drapier, Frank Ellinghaus, E. R. Kinney, D. P. Morrison, S. Campbell, V. E. Semenov, Tatsuya Chujo, I. Tserruya, Yu. Efremenko, V. Singh, Jen-Chieh Peng, Xiong Wang, Dong Jo Kim, A. Veicht, and T. L. Thomas

Subjects
Elastic scattering, Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, media_common.quotation_subject, Nuclear Theory, HERA, 01 natural sciences, 7. Clean energy, Asymmetry, Nuclear physics, Momentum, Pion, 0103 physical sciences, High Energy Physics::Experiment, Neutron, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider, Spin-½, media_common
Abstract

The energy dependence of the single-transverse-spin asymmetry, A(N), and the cross section for neutron production at very forward angles were measured in the PHENIX experiment at the Relativistic Heavy Ion Collider for polarized p + p collisions at root s = 200 GeV. The neutrons were observed in forward detectors covering an angular range of up to 2.2 mrad. We report results for neutrons with a momentum fraction of x(F) = 0.45 to 1.0. The energy dependence of the measured cross sections were consistent with x(F) scaling, compared to measurements by an experiment at the Intersecting Storage Ring, which measured neutron production in unpolarized p + p collisions at root s = 30.6-62.7 GeV. The cross sections for large x(F) neutron production for p + p collisions, as well as those in e + p collisions measured at the Hadron-Electron Ring Accelerator, are described by a pion exchange mechanism. The observed forward neutron asymmetries were large, reaching A(N) = -0.08 +/- 0.02 for x(F) = 0.8; the measured backward asymmetries, for negative x(F), were consistent with zero. The observed asymmetry for forward neutron production is discussed within the pion exchange framework, with interference between the spin-flip amplitude due to the pion exchange and nonflip amplitudes from all Reggeon exchanges. Within the pion exchange description, the measured neutron asymmetry is sensitive to the contribution of other Reggeon exchanges even for small amplitudes.

Published
2013
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107. Medium Modification of Jet Fragmentation inAu+AuCollisions atsNN=200 GeVMeasured in Direct Photon-Hadron Correlations

Author

K. Dehmelt, M. Kurosawa, Jen-Chieh Peng, F. Matathias, L. D'Orazio, Y. J. Mao, S. Kametani, Kensuke Homma, E. Richardson, Saskia Mioduszewski, P. Constantin, S. Miyasaka, Takao Sakaguchi, J. H. Kang, J. S. Haggerty, S. R. Lee, S. Chernichenko, B. Meredith, B. Bassalleck, C. Klein-Boesing, John Hill, Inkyu Park, P. D. Barnes, Jongmin Lee, A. D. Frawley, T. Tabaru, M. Konno, Hongfang Liu, Toru Sugitate, D. E. Fields, S. Huang, C. Silvestre, L. D. Isenhower, B. V. Jacak, B. Lewis, B. Komkov, Xiong Wang, O. Dietzsch, S. H. Aronson, J. Jin, E. M. Takagui, H. Valle, M. McCumber, Dong Jo Kim, W. Holzmann, Y. S. Lai, Marisilvia Donadelli, V. Bumazhnov, M. P. Comets, K. Sakashita, Herve Borel, D. Lynch, J. Hanks, Hiroaki Ohnishi, K. B. Lee, François Fleuret, R. A. Soltz, Dipanwita Dutta, Y. Nakamiya, D. Kotov, Norio Saito, Tsutomu Mibe, M. A. L. Leite, Y. Tsuchimoto, C. Gal, Y. Miyachi, Sung Keun Park, Tomoya Tsuji, M. Mendoza, S. N. White, N. N. Ajitanand, A. Taketani, D. S. Jumper, Takahiro Nakamura, Julia Velkovska, R. Tanabe, D. Layton, D. McGlinchey, Y. Ikeda, Maya Hachiya Shimomura, R. S. Hollis, Susumu Oda, A. Durum, J. Egdemir, Zvi Hirsh Citron, Y. I. Makdisi, M. Grosse Perdekamp, S. H. Lim, K. Yamaura, K. O. Eyser, A. K. Purwar, K. Fujiwara, K. Nakano, J. G. Boissevain, R. Belmont, M. Stepanov, G. Baksay, Jason Kamin, M. B. Deaton, A. Sen, Masashi Kaneta, V. L. Rykov, T. Dahms, K. B. Kim, L. Ding, W. E. Sondheim, J. S. Kapustinsky, M. E. Connors, D. Ivanischev, V. Babintsev, S. P. Stoll, V. S. Pantuev, M. Sano, I. Tserruya, Y. L. Yamaguchi, D. Roach, K. M. Kijima, Yu. Efremenko, Tae-Yeon Lee, Martin Purschke, C. A. Aidala, S. Tarafdar, R. Akimoto, C. Pinkenburg, M. Rosati, W. C. Chang, R. Vértesi, K. Boyle, P. A. Rukoyatkin, C. R. Cleven, V. Singh, Y. Tanaka, J. Hamblen, C. Haegemann, Y. Inoue, C. Baumann, B. Sahlmueller, K. Hashimoto, E. Leitner, I. Ravinovich, M. Tomášek, G. S. Kyle, S. S.E. Rosendahl, G. Bunce, Y. J. Kim, M. J. Tannenbaum, H. Torii, Junji Tojo, James Alexander, J. Zimanyi, G. Roche, B. Love, A. Yu. Semenov, Rushan Han, S. Butsyk, Vladimir Samsonov, A. A. Vinogradov, E. Mannel, M. S. Daugherity, C. P. Singh, T. Ichihara, B. M. Johnson, Osamu Jinnouchi, M. Javani, Xingguo Li, Peter Christiansen, D. Winter, D. Yu Peressounko, Matthew G. Reuter, Atsushi Takahara, K. A. Drees, K. Karatsu, Filip Krizek, J. Gosset, Y. Hori, Anne Marie Sickles, Y. Nagata, Takahiro Fusayasu, R. Averbeck, E. C. Aschenauer, A. Churyn, Byung-Sik Hong, A. Bazilevsky, D. Mukhopadhyay, E. Tennant, S. Rembeczki, R. J. Petti, K. Okada, H. W. Van Hecke, J. T. Mitchell, D. Jouan, Philippe Rosnet, M. Bai, T. Kempel, Dong-Hun Kim, Eva Haslum, B. Lenzi, A. Morreale, S. Kaneti, R. Seidl, Vladislav Manko, S. Belikov, S. Baumgart, H. En'yo, M. J. Leitch, Christine Nattrass, T. Todoroki, Jiangyong Jia, C. L. Woody, A. Berdnikov, Y. Goto, A. Isupov, C. Suire, M. Naglis, Alexander Malakhov, Z. Fraenkel, H. J. Moon, F. Staley, L. Baksay, A. Glenn, J. Sziklai, D. Silvermyr, L. S. Zolin, Alexandre Lebedev, A. G. Litvinenko, D. M. Lee, K. Gainey, J. E. Frantz, M. Slunečka, Zhiying You, D. Kotchetkov, R. Bennett, C. A. Ogilvie, Brian Cole, Minghui Liu, Tamas Ferenc Csorgo, S. Afanasiev, A. Ster, W. J. Park, Eunja Kim, K. Watanabe, Christopher Rosen, R. S. Towell, R. K. Choudhury, S. P. Sorensen, D. Kleinjan, A. Yanovich, Dylan Walker, J. P. Wood, P. Tarján, I. Garishvili, Akio Kiyomichi, F. Wei, J. Klatsky, X. Bing, O. Chvala, M. Kawashima, S. Yokkaichi, K. Kiriluk, M. Finger, S. Dairaku, T. K. Hemmick, Seong H. Kim, J. M. Durham, E. H. Kim, Dmitry Blau, B. Azmoun, A. Král, M. J. Kweon, X. Jiang, Yasuo Miake, Masayasu Ishihara, O. Zaudtke, K. Shoji, G. R. Young, C. Vale, B. S. Chang, J. Newby, A. Kozlov, Alexander Milov, M. Heffner, Kyeongpil Lee, R. Seto, I. Nakagawa, R. Luechtenborg, Tomofumi Nagae, J. L. Nagle, P. Castera, Kenneth Francis Read, A. Kiss, M. Soumya, P. W. Stankus, Young-Ki Kim, N. Kurihara, K. Haruna, H. Pei, E. J. Desmond, T. Engelmore, N. Novitzky, J. G. Lajoie, J. Ide, Z. Yasin, T. Hachiya, Henner Buesching, O. Drapier, Frank Ellinghaus, M. Virius, E. T. Atomssa, L. Kochenda, M. Issah, M. Togawa, E. Vazquez-Zambrano, J. Klay, M. K. Lee, J. S. Kang, Steve Edwards, I. Danchev, S. Takagi, M. Oka, E. R. Kinney, Tadaaki Isobe, C. Y. Chi, A. Nederlof, J. Park, D. Hornback, D. P. Morrison, P. Kline, K. S. Lee, K. Das, H. J. Kim, A. Rakotozafindrabe, A. Kravitz, E. P. Hartouni, S. Campbell, M. Gonin, D. Kawall, B. H. Kang, Senta Greene, V. E. Semenov, K. N. Barish, Y. Komatsu, H. Themann, S. Wolin, R. Pak, C. H. Chen, M. Kasai, N. Kamihara, Steven E. Skutnik, K. S. Sim, V. Dzhordzhadze, M. I. Nagy, Y. Kwon, A. Garishvili, X. Gong, Marcus Hohlmann, V. I. Kochetkov, P. L. McGaughey, A. Taranenko, S. Sano, P. Liebing, H. Al-Ta'Ani, A. Sukhanov, K. Kurita, D. Watanabe, L. A. Linden Levy, Tatsuya Chujo, H. Pereira, A. T. Basye, I. V. Sourikova, I. E. Yushmanov, A. Manion, B. E. Norman, R. Armendariz, Y. Morino, M. Chiu, J. Murata, Byoungchoo Park, A. Drees, R. Yang, H. Qu, H. Hiejima, K. S. Joo, S. Taneja, Kazushi Miki, T. Horaguchi, Brajesh K. Singh, S. Bathe, Gerd Joachim Kunde, Charles Maguire, L. Guo, Alexei Khanzadeev, Agneta Oskarsson, Shinichi Masumoto, S. Choi, B. Fadem, E. O'Brien, C. O. Kim, I. Shein, E. Stenlund, J. B. Choi, H. Sakata, J. Kubart, A. V. Kazantsev, M. Vargyas, M. L. Brooks, Hideki Hamagaki, K. Aoki, G. David, K. Imai, K. I. Hahn, Y. Onuki, M. D. Malik, X. He, Y. Berdnikov, S. H. Lee, Y. Akiba, C. McKinney, E. Vznuzdaev, K. Sedgwick, M. Mishra, S. Nagamiya, Dipak Kumar Mishra, Kiyoshi Tanida, O. O. Omiwade, E. Kistenev, L. Tomášek, N. Apadula, P. Mikeš, Alberto Baldisseri, Mihael Makek, Jan Rak, M. Ouchida, N. Means, R. Lacey, Y. Aramaki, V. Peresedov, R. Granier de Cassagnac, A. Adare, Vaclav Vrba, Klaus Johannes Reygers, Rui Wei, J. Asai, H. Harada, J. Sun, J. Koster, L. Patel, A. Deshpande, T. V. Moukhanova, S. Batsouli, Shingo Sakai, T. L. Thomas, A. Vossen, H. Masui, A. K. Dubey, T. C. Awes, Kyoichiro Ozawa, T. Liška, J. S. Bok, A. A. Bickley, Jun Kikuchi, A. Veicht, Y. Watanabe, Ryugo S. Hayano, A. Romana, I. Younus, Y. Riabov, Kenta Shigaki, M. Nguyen, A. S. Nyanin, S. Esumi, D. Sharma, Rachid Nouicer, A. N. Zelenski, M. Proissl, R. Ichimiya, A. Soldatov, C. Zhang, A. Hadj Henni, Beomkyu Kim, H. Å Gustafsson, Wei Xie, P. Ružička, I. J. Choi, L. Aphecetche, A. Dion, Johannes Peter Wessels, Viktor Riabov, K. V. Dharmawardane, H. Iinuma, A. P.T. Palounek, Aaron Angerami, W. A. Zajc, V. Baublis, A. Denisov, Yuki Watanabe, V. Cianciolo, Y. Tomita, Sergey Fokin, Ajit Kumar Mohanty, T. A. Shibata, C. L. Silva, T. Sato, D. Isenhower, A. Toia, L. Mašek, H. Kanou, Taku Gunji, H. Gong, J. Seele, F. Kajihara, H. Delagrange, S. Zhou, C. M. Camacho, S. D. Rolnick, Prashant Shukla, S. F. Pate, J. L. Charvet, Ke. Nakamura, T. E. Miller, H. Al-Bataineh, A. Enokizono, P. Chung, J. Imrek, S. Motschwiller, Susumu Sato, W. S. Emam, V. Papavassiliou, Sébastien Gadrat, A. Datta, H. Asano, M. Mitrovski, Takafumi Niida, Bum-Hoon Lee, M. Wysocki, B. Bannier, T. Murakami, Robert F. Hobbs, Debashish Pal, S. Sawada, J. Ying, A. Franz, R. Reynolds, M. Sarsour, Mate Csanad, A. Iordanova, M. Nihashi, David D'Enterria, R. P. Pisani, M. N. Wagner, Y. Fukao, A. Shevel, T. Hester, N. A. Sparks, V-N. Tram, N. Grau, M. Leitgab, Motoi Inaba, R. M. Wright, J. Chiba, and Alice Mignerey

Subjects
Physics, Energy loss, Photon, 010308 nuclear & particles physics, Hadron, General Physics and Astronomy, 7. Clean energy, 01 natural sciences, Nuclear physics, Fragmentation (mass spectrometry), 0103 physical sciences, Fragmentation function, High Energy Physics::Experiment, Atomic physics, Nuclear Experiment, 010306 general physics
Abstract

The jet fragmentation function is measured with direct photon-hadron correlations in p + p and Au + Au collisions at root S-NN = 200 GeV. The P-T of the photon is an excellent approximation to the initial P-T of the jet and the ratio Z(T) = P-T(h)/P-T(gamma) is used as a proxy for the jet fragmentation function. A statistical subtraction is used to extract the direct photon-hadron yields in Au + Au collisions while a photon isolation cut is applied in p + p. I-AA, the ratio of hadron yield opposite the photon in Au + Au to that in p + p, indicates modification of the jet fragmentation function. Suppression, most likely due to energy loss in the medium, is seen at high Z(T). The associated hadron yield at low Z(T) is enhanced at large angles. Such a trend is expected from redistribution of the lost energy into increased production of low-momentum particles.

Published
2013
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108. Nuclear modification of ψ', χc, and J/ψ production in d+Au collisions at sqrt[s(NN)]=200 GeV

Author

A, Adare, C, Aidala, N N, Ajitanand, Y, Akiba, H, Al-Bataineh, J, Alexander, A, Angerami, K, Aoki, N, Apadula, Y, Aramaki, E T, Atomssa, R, Averbeck, T C, Awes, B, Azmoun, V, Babintsev, M, Bai, G, Baksay, L, Baksay, K N, Barish, B, Bassalleck, A T, Basye, S, Bathe, V, Baublis, C, Baumann, A, Bazilevsky, S, Belikov, R, Belmont, R, Bennett, J H, Bhom, D S, Blau, J S, Bok, K, Boyle, M L, Brooks, H, Buesching, V, Bumazhnov, G, Bunce, S, Butsyk, S, Campbell, A, Caringi, C-H, Chen, C Y, Chi, M, Chiu, I J, Choi, J B, Choi, R K, Choudhury, P, Christiansen, T, Chujo, P, Chung, O, Chvala, V, Cianciolo, Z, Citron, B A, Cole, Z, Conesa del Valle, M, Connors, M, Csanád, T, Csörgő, T, Dahms, S, Dairaku, I, Danchev, K, Das, A, Datta, G, David, M K, Dayananda, A, Denisov, A, Deshpande, E J, Desmond, K V, Dharmawardane, O, Dietzsch, A, Dion, M, Donadelli, O, Drapier, A, Drees, K A, Drees, J M, Durham, A, Durum, D, Dutta, L, D'Orazio, S, Edwards, Y V, Efremenko, F, Ellinghaus, T, Engelmore, A, Enokizono, H, En'yo, S, Esumi, B, Fadem, D E, Fields, M, Finger, F, Fleuret, S L, Fokin, Z, Fraenkel, J E, Frantz, A, Franz, A D, Frawley, K, Fujiwara, Y, Fukao, T, Fusayasu, I, Garishvili, A, Glenn, H, Gong, M, Gonin, Y, Goto, R, Granier de Cassagnac, N, Grau, S V, Greene, G, Grim, M, Grosse Perdekamp, T, Gunji, H-Å, Gustafsson, J S, Haggerty, K I, Hahn, H, Hamagaki, J, Hamblen, R, Han, J, Hanks, E, Haslum, R, Hayano, X, He, M, Heffner, T K, Hemmick, T, Hester, J C, Hill, M, Hohlmann, W, Holzmann, K, Homma, B, Hong, T, Horaguchi, D, Hornback, S, Huang, T, Ichihara, R, Ichimiya, Y, Ikeda, K, Imai, M, Inaba, D, Isenhower, M, Ishihara, M, Issah, D, Ivanischev, Y, Iwanaga, B V, Jacak, J, Jia, X, Jiang, J, Jin, B M, Johnson, T, Jones, K S, Joo, D, Jouan, D S, Jumper, F, Kajihara, J, Kamin, J H, Kang, J, Kapustinsky, K, Karatsu, M, Kasai, D, Kawall, M, Kawashima, A V, Kazantsev, T, Kempel, A, Khanzadeev, K M, Kijima, J, Kikuchi, A, Kim, B I, Kim, D J, Kim, E-J, Kim, Y-J, Kim, E, Kinney, Á, Kiss, E, Kistenev, D, Kleinjan, L, Kochenda, B, Komkov, M, Konno, J, Koster, A, Král, A, Kravitz, G J, Kunde, K, Kurita, M, Kurosawa, Y, Kwon, G S, Kyle, R, Lacey, Y S, Lai, J G, Lajoie, A, Lebedev, D M, Lee, J, Lee, K B, Lee, K S, Lee, M J, Leitch, M A L, Leite, X, Li, P, Lichtenwalner, P, Liebing, L A, Linden Levy, T, Liška, H, Liu, M X, Liu, B, Love, D, Lynch, C F, Maguire, Y I, Makdisi, M D, Malik, V I, Manko, E, Mannel, Y, Mao, H, Masui, F, Matathias, M, McCumber, P L, McGaughey, D, McGlinchey, N, Means, B, Meredith, Y, Miake, T, Mibe, A C, Mignerey, K, Miki, A, Milov, J T, Mitchell, A K, Mohanty, H J, Moon, Y, Morino, A, Morreale, D P, Morrison, T V, Moukhanova, T, Murakami, J, Murata, S, Nagamiya, J L, Nagle, M, Naglis, M I, Nagy, I, Nakagawa, Y, Nakamiya, K R, Nakamura, T, Nakamura, K, Nakano, S, Nam, J, Newby, M, Nguyen, M, Nihashi, R, Nouicer, A S, Nyanin, C, Oakley, E, O'Brien, S X, Oda, C A, Ogilvie, M, Oka, K, Okada, Y, Onuki, A, Oskarsson, M, Ouchida, K, Ozawa, R, Pak, V, Pantuev, V, Papavassiliou, I H, Park, S K, Park, W J, Park, S F, Pate, H, Pei, J-C, Peng, H, Pereira, D, Perepelitsa, D Yu, Peressounko, R, Petti, C, Pinkenburg, R P, Pisani, M, Proissl, M L, Purschke, H, Qu, J, Rak, I, Ravinovich, K F, Read, S, Rembeczki, K, Reygers, V, Riabov, Y, Riabov, E, Richardson, D, Roach, G, Roche, S D, Rolnick, M, Rosati, C A, Rosen, S S E, Rosendahl, P, Ružička, B, Sahlmueller, N, Saito, T, Sakaguchi, K, Sakashita, V, Samsonov, S, Sano, T, Sato, S, Sawada, K, Sedgwick, J, Seele, R, Seidl, R, Seto, D, Sharma, I, Shein, T-A, Shibata, K, Shigaki, M, Shimomura, K, Shoji, P, Shukla, A, Sickles, C L, Silva, D, Silvermyr, C, Silvestre, K S, Sim, B K, Singh, C P, Singh, V, Singh, M, Slunečka, R A, Soltz, W E, Sondheim, S P, Sorensen, I V, Sourikova, P W, Stankus, E, Stenlund, S P, Stoll, T, Sugitate, A, Sukhanov, J, Sziklai, E M, Takagui, A, Taketani, R, Tanabe, Y, Tanaka, S, Taneja, K, Tanida, M J, Tannenbaum, S, Tarafdar, A, Taranenko, H, Themann, D, Thomas, T L, Thomas, M, Togawa, A, Toia, L, Tomášek, H, Torii, R S, Towell, I, Tserruya, Y, Tsuchimoto, C, Vale, H, Valle, H W, van Hecke, E, Vazquez-Zambrano, A, Veicht, J, Velkovska, R, Vértesi, M, Virius, V, Vrba, E, Vznuzdaev, X R, Wang, D, Watanabe, K, Watanabe, Y, Watanabe, F, Wei, R, Wei, J, Wessels, S N, White, D, Winter, C L, Woody, R M, Wright, M, Wysocki, Y L, Yamaguchi, K, Yamaura, R, Yang, A, Yanovich, J, Ying, S, Yokkaichi, Z, You, G R, Young, I, Younus, I E, Yushmanov, W A, Zajc, and S, Zhou

Abstract

We present results for three charmonia states (ψ', χc, and J/ψ) in d+Au collisions at |y|0.35 and sqrt[s(NN)]=200 GeV. We find that the modification of the ψ' yield relative to that of the J/ψ scales approximately with charged particle multiplicity at midrapidity across p+A, d+Au, and A+A results from the Super Proton Synchrotron and the Relativistic Heavy Ion Collider. In large-impact-parameter collisions we observe a similar suppression for the ψ' and J/ψ, while in small-impact-parameter collisions the more weakly bound ψ' is more strongly suppressed. Owing to the short time spent traversing the Au nucleus, the larger ψ' suppression in central events is not explained by an increase of the nuclear absorption owing to meson formation time effects.

Published
2013

109. Direct photon production ind+Au collisions atsNN=200GeV

Author

A. Devismes, Y. Onuki, Taku Gunji, H. Gong, J. Seele, Alexander Milov, I. Nakagawa, Jan Rak, T. Engelmore, F. Kajihara, S. V. Afanasiev, L. Aphecetche, Takeo Kawabata, H. Pei, M. C. McCain, R. Lacey, Aaron Angerami, Tadaaki Isobe, O. Drapier, S. S. Adler, G. S. Kyle, H. Delagrange, Frank Ellinghaus, N. Willis, R. Granier de Cassagnac, A. Adare, E. R. Kinney, D. P. Morrison, James Alexander, S. Campbell, W. A. Zajc, Hongfang Liu, D. E. Fields, A. Dion, M. Slunečka, R. Averbeck, P. L. McGaughey, Byung-Sik Hong, V. Baublis, S. Zhou, A. Denisov, V. E. Semenov, J. Zimányi, B. V. Jacak, A. Bazilevsky, V. Cianciolo, Johannes Peter Wessels, Hiroaki Ohnishi, K. B. Lee, H. J. Kim, Y. Fukao, S. D. Rolnick, T. Murakami, Y. Tomita, Philippe Rosnet, Sergey Fokin, C. Silvestre, M. McCumber, A. K. Purwar, Robert F. Hobbs, J. M. Qualls, T. Hester, Alexandre Lebedev, R. Vértesi, A. Hoover, A. Hadj Henni, Dmitry Blau, Ch. Finck, Jason Newby, J. Murata, I. Tserruya, Yu. Efremenko, D. M. Lee, Xiaopeng Zong, E. J. Desmond, Masamichi Ishihara, B. Khachaturov, Beomkyu Kim, Jean-Pierre Cussonneau, M. Togawa, J. Hanks, E. Vazquez-Zambrano, D. Roach, S. Belikov, K. S. Joo, Florian Bauer, K. Watanabe, V. Singh, K. Shoji, A. Rakotozafindrabe, P. Tarján, Marisilvia Donadelli, K. M. Kijima, V. Bumazhnov, M. P. Comets, G. B. Kim, Sean A. Kelly, Minghui Liu, Wei Xie, V. S. Pantuev, M. Kasai, T. Matsumoto, K. Kiriluk, M. Chiu, Ajit Kumar Mohanty, Y. Tsuchimoto, Y. Iwanaga, Maya Hachiya Shimomura, I. E. Yushmanov, Eun-Hee Kim, M. Ouchida, Alexei Khanzadeev, Viktor Veszpremi, T. A. Shibata, C. L. Silva, T. Sato, N. Bruner, N. Means, E. Stenlund, Sung Keun Park, J. B. Choi, M. Heffner, P. W. Stankus, Kenneth Francis Read, S. Sawada, J. Ying, A. Franz, K. Hasuko, B. D. Fox, S. Tarafdar, K. S. Sim, J. Hamblen, A. Yu. Semenov, J. Asai, J. H. Bhom, H. A. Gustafsson, T. Ichihara, N. Apadula, R. Tanabe, D. Layton, N. N. Ajitanand, T. V. Moukhanova, Margaret Harvey, V-N. Tram, N. Grau, O. Dietzsch, B. Komkov, E. T. Atomssa, Y. I. Makdisi, Xingguo Li, Junji Tojo, Y. Kwon, J. Gosset, H. Valle, D. Isenhower, A. Toia, L. Mašek, A. G. Hansen, Shingo Sakai, Hirohiko Sato, Takahiro Nakamura, A. V. Kazantsev, Y. Tanaka, E. Mannel, T. K. Shea, J. P. Sullivan, R. Yang, H. Hiejima, Dipanwita Dutta, B. Espagnon, Joakim Nystrand, Eunja Kim, Eva Haslum, B. Lenzi, K. A. Drees, C. Zhang, German Martinez, Motoi Inaba, P. Ružička, Senta Greene, S. Taneja, K. Okada, Jen-Chieh Peng, W. C. Chang, D. McGlinchey, M. I. Nagy, Julia Velkovska, R. M. Wright, L. Tomášek, M. Rosati, M. Velkovsky, S. P. Sorensen, H. En'yo, D. Watanabe, Susumu Oda, A. T. Basye, M. D. Malik, C. L. Woody, A. Berdnikov, J. L. Charvet, Viktor Riabov, K. Imai, P. Constantin, M. J. Leitch, E. Vznuzdaev, H. Qu, H. J. Moon, F. Staley, L. Baksay, O. Chvala, M. Nihashi, A. Durum, B. Fadem, E. O'Brien, Gary Grim, M. J. Tannenbaum, Rushan Han, S. Esumi, S. Batsouli, K. V. Dharmawardane, A. Caringi, T. E. Miller, K. Karatsu, Inkyu Park, M. Inuzuka, R. A. Soltz, D. S. Brown, K. Yamaura, Z. Conesa del Valle, Hideki Hamagaki, K. Aoki, Seong H. Kim, Charles Maguire, S. Leckey, Takafumi Niida, Anne Marie Sickles, A. A. Vinogradov, Henrik Tydesjö, T. C. Awes, Kyoichiro Ozawa, T. Liška, R. Santo, Jiangyong Jia, Y. Goto, A. Ster, A. Enokizono, J. S. Bok, Jun Kikuchi, J. G. Lajoie, T. Hachiya, David D'Enterria, G. David, M. Grosse Perdekamp, V. V. Ikonnikov, K. I. Hahn, P. Chung, Dong Jo Kim, M. E. Connors, A. Pierson, J. M. Burward-Hoy, Josh Moss, Kiyoshi Tanida, M. K. Dayananda, M. Wysocki, D. Sharma, J. Imrek, D. Kleinjan, R. P. Pisani, D. Mukhopadhyay, R. Ichimiya, S. Rembeczki, S. Butsyk, Vladimir Samsonov, H. Iinuma, I. Otterlund, A. Veicht, A. Datta, E. Kistenev, I. J. Choi, A. Kravitz, J. M. Heuser, M. Gonin, Nikolay Tyurin, D. Bucher, I. V. Sourikova, H. Torii, T. L. Thomas, S. Yokkaichi, A. P.T. Palounek, C. H. Kuberg, G. R. Young, L. Sanfratello, David Olle Rickard Silvermyr, T. Jones, Peter Christiansen, K. Das, P. Lichtenwalner, D. Hornback, Tae-Yeon Lee, V.N. Penev, Martin Purschke, M. A. Volkov, J. Chiba, Alice Mignerey, Ryugo S. Hayano, L. D'Orazio, C. A. Aidala, D. Winter, D. Yu Peressounko, C. M. Camacho, E. P. Hartouni, A. Sukhanov, K. Kurita, H. Pereira, Prashant Shukla, G. C. Mishra, Y. Riabov, Kenta Shigaki, P. J. Kroon, Y. Ikeda, A. Taranenko, M. Nguyen, Kazushi Miki, Takao Sakaguchi, Tamas Ferenc Csorgo, T. Kempel, Dong-Hun Kim, J. G. Boissevain, S. F. Pate, Y. Morino, Masashi Kaneta, A. S. Nyanin, C. Klein-Boesing, Ke. Nakamura, Brajesh K. Singh, Rachid Nouicer, Norio Saito, M. Proissl, Tsutomu Mibe, J. L. Nagle, H. Al-Bataineh, X. R. Wang, K. Katou, A. D. Frawley, R. Pak, S. Huang, S. H. Aronson, C. Pinkenburg, V. Papavassiliou, W. Holzmann, Sébastien Gadrat, D. Kotchetkov, M. Stepanov, G. Roche, S. Kametani, T. Horaguchi, Pàl Hidas, J. H. Kang, J. S. Haggerty, A. Romana, A. Morreale, M. A. L. Leite, Z. Fraenkel, J. L. Drachenberg, Y. S. Lai, R. K. Choudhury, S. C. Johnson, B. Azmoun, Y. J. Mao, A. Král, M. J. Kweon, Y. Le Bornec, M. Oka, K. S. Lee, P. Liebing, C. A. Ogilvie, T. K. Hemmick, R. Belmont, J. S. Kapustinsky, J. M. Durham, V. Babintsev, A. Kiss, Henner Buesching, Steve Edwards, Yasuo Miake, P. Chand, Marcus Hohlmann, L. A. Linden Levy, P. Mikeš, X. Jiang, L. Kochenda, M. Issah, H. Kobayashi, Agneta Oskarsson, Y. Berdnikov, Y. Akiba, M. Mishra, S. Nagamiya, Kazuhiro Tanaka, K. Sakashita, Vaclav Vrba, Klaus Johannes Reygers, R. Kohara, Jason Kamin, M. Csanad, Rui Wei, S. P. Stoll, S. S.E. Rosendahl, G. Bunce, J.-G. Park, A. Churyn, D. Jouan, Ferenc Deák, N. Kamihara, Aram Kim, R. Armendariz, C. Oakley, A. Drees, Xiao-yan Li, K. O. Eyser, K. Fujiwara, S. W. Nam, Y. L. Yamaguchi, I. Ravinovich, M. Bai, S. S. Ryu, Zhiying You, R. Bennett, H. W. Van Hecke, M. Kawashima, Ahmed Al-Jamel, M. Finger, S. Dairaku, O. Zaudtke, M. Virius, C. H. Chen, Y. Cobigo, J. E. Frantz, Jongmin Lee, Herve Borel, A. Glenn, A. Taketani, D. S. Jumper, V. L. Rykov, T. Dahms, X. He, Y. Aramaki, V. Peresedov, J. Koster, H. Masui, A. K. Dubey, A. A. Bickley, S. Takagi, S. Y. Fung, B. Meredith, K. N. Barish, S. Bathe, F. Matathias, Kensuke Homma, E. Richardson, John Hill, K. Oyama, S. Chernichenko, S. Sano, H. Lim, B. Bassalleck, Toru Sugitate, L. D. Isenhower, T. J. Uam, M. Konno, M. L. Brooks, B. Love, François Fleuret, Marie Germain, A. G. Litvinenko, J. T. Mitchell, Osamu Jinnouchi, F. K. Wohn, A. Kozlov, R. Seto, K. Haruna, Matthew G. Reuter, Takahiro Fusayasu, R. Seidl, Vladislav Manko, I. D. Ojha, Alexander Malakhov, V. Dzhordzhadze, I. Danchev, L. S. Zolin, W. J. Park, Christopher Rosen, P. D. Barnes, A. Yanovich, S. N. White, Deepa Thomas, T. Chujo, Zvi Hirsh Citron, K. Nakano, W. E. Sondheim, D. Ivanischev, K. Boyle, P. A. Rukoyatkin, X. Camard, C. Vale, B. S. Chang, J. Klay, Y. Nakamiya, D. Lynch, G. Baksay, M. T. Bjorndal, B. Sahlmueller, Y. J. Kim, A. Deshpande, Y. Watanabe, I. Younus, A. Soldatov, D. Kawall, H. Themann, V. I. Kochetkov, Gerd Joachim Kunde, I. Shein, M. Kurosawa, Saskia Mioduszewski, K. Sedgwick, Alberto Baldisseri, Yves Roland Schutz, D. Pal, J. Jin, M. Naglis, E. M. Takagui, C. Baumann, C. P. Singh, B. M. Johnson, R. J. Petti, A. Isupov, C. Suire, J. Sziklai, Brian Cole, R. S. Towell, Susumu Sato, M. Muniruzzaman, I. Garishvili, Akio Kiyomichi, F. Wei, and C. Y. Chi

Subjects
Physics, Nuclear and High Energy Physics, Photon, 010308 nuclear & particles physics, Virtual particle, 01 natural sciences, 7. Clean energy, Photon yield, Nuclear physics, 0103 physical sciences, Atomic physics, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider
Abstract

Direct photons have been measured in root s(NN) = 200 GeV d + Au collisions at midrapidity. A wide p(T) range is covered by measurements of nearly real virtual photons (1 < p(T) < 6 GeV/c) and real photons (5 < p(T) < 16 GeV/c). The invariant yield of the direct photons in d + Au collisions over the scaled p + p cross section is consistent with unity. Theoretical calculations assuming standard cold-nuclear-matter effects describe the data well for the entire p(T) range. This indicates that the large enhancement of direct photons observed in Au + Au collisions for 1.0 < p(T) < 2.5 GeV/c is attributable to a source other than the initial-state nuclear effects.

Published
2013
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110. Υ(1S+2S+3S)production ind+Au andp+pcollisions atsNN=200GeV and cold-nuclear-matter effects

Author

Y. Tanaka, E. Mannel, H. J. Moon, L. Baksay, Charles Maguire, Kiyoshi Tanida, E. Kistenev, P. Lichtenwalner, Alice Mignerey, J. Sun, L. D'Orazio, Y. Fukao, Atsushi Takahara, K. A. Drees, Takao Sakaguchi, Y. Ikeda, Jen-Chieh Peng, C. Klein-Boesing, J. G. Boissevain, T. Hester, A. D. Frawley, R. Akimoto, Inkyu Park, S. Huang, Xiong Wang, Z. Conesa del Valle, Dong Jo Kim, K. R. Andrews, R. A. Soltz, H. Borel, W. Holzmann, Maya Hachiya Shimomura, R. S. Hollis, X. He, Y. Aramaki, V. Peresedov, M. Grosse Perdekamp, Hongfang Liu, D. E. Fields, B. V. Jacak, Y. I. Makdisi, M. E. Connors, C. Pinkenburg, M. J. Tannenbaum, V-N. Tram, N. Grau, K. Das, E. P. Hartouni, M. McCumber, J. Koster, M. Mendoza, S. N. White, Deepa Thomas, I. Tserruya, Yu. Efremenko, V. Singh, C. A. Ogilvie, H. Torii, A. Kim, D. Mukhopadhyay, E. Tennant, S. Rembeczki, L. Aphecetche, S. Batsouli, Motoi Inaba, H. Masui, A. K. Dubey, Zvi Hirsh Citron, M. Stepanov, G. Roche, A. Yu. Semenov, J. Gosset, Kisung Lee, T. K. Hemmick, M. Naglis, R. M. Wright, M. Sarsour, Mate Csanad, A. Iordanova, J. M. Durham, K. Nakano, T. Jones, Peter Christiansen, Yasuo Miake, A. A. Bickley, A. Veicht, K. N. Barish, J. Hanks, J. L. Charvet, M. Nihashi, W. E. Sondheim, A. Dion, Sung Keun Park, Masayasu Ishihara, D. Winter, D. Yu Peressounko, P. Tarján, D. Ivanischev, K. Boyle, P. A. Rukoyatkin, J. S. Kang, L. Kochenda, M. Issah, David D'Enterria, F. Staley, S. Nam, S. Sano, A. Glenn, A. Enokizono, P. Chung, J. Imrek, M. L. Brooks, K. S. Sim, V. S. Pantuev, V. Dzhordzhadze, A. Datta, B. Meredith, A. Deshpande, S. Yokkaichi, N. N. Ajitanand, Y. Nakamiya, Johannes Peter Wessels, K. Sakashita, D. Kotov, B. Love, Y. Watanabe, J. Hamblen, Eunja Kim, Takahiro Nakamura, I. Younus, Y. Kwon, R. Yang, Alexander Milov, Taku Gunji, H. Gong, J. Seele, F. Kajihara, D. McGlinchey, A. G. Litvinenko, S. Tarafdar, Y. J. Mao, A. Soldatov, D. Kawall, Susumu Oda, Jason Kamin, H. Themann, G. Baksay, S. Taneja, S. Butsyk, John Hill, M. I. Nagy, K. Okada, J. Murata, J. H. Kang, A. Kozlov, H. En'yo, A. Durum, A. Kiss, Senta Greene, Gerd Joachim Kunde, I. Nakagawa, Young-Ki Kim, T. Engelmore, R. Seto, K. Imai, M. Gonin, J. S. Haggerty, S. R. Lee, S. P. Stoll, D. Watanabe, I. Shein, M. J. Leitch, T. Sodre, S. Zhou, K. Karatsu, Eva Haslum, B. Lenzi, A. Baldisseri, A. T. Basye, Jongmin Lee, K. Haruna, S. D. Rolnick, J. Ben-Benjamin, Y. Hori, Anne Marie Sickles, I. Danchev, B. Fadem, E. O'Brien, O. Dietzsch, S. Afanasiev, Henner Buesching, Toru Sugitate, Steve Edwards, B. Lewis, K. Sedgwick, Minghui Liu, Catherine Micaela Silvestre, K. Yamaura, S. S.E. Rosendahl, G. Bunce, E. T. Atomssa, B. Sahlmueller, H. Valle, O. Drapier, A. Ster, Frank Ellinghaus, E. R. Kinney, D. P. Morrison, K. Utsunomiya, M. D. Malik, E. Vznuzdaev, X. Gong, Marcus Hohlmann, J. Newby, D. Lynch, Y. J. Kim, Ajit Kumar Mohanty, T. A. Shibata, C. L. Silva, T. Sato, Dipanwita Dutta, A. Churyn, M. Heffner, D. Jouan, S. Campbell, H. A. Gustafsson, B. H. Kang, V. E. Semenov, A. Sukhanov, K. Kurita, A. Taketani, Kenneth Francis Read, L. A. Linden Levy, P. Mikeš, B. Azmoun, A. Král, F. Matathias, D. S. Jumper, M. J. Kweon, D. Hornback, Kensuke Homma, R. S. Towell, C. Zhang, H. Pereira, Y. Morino, C. Gal, G. R. Young, D. Isenhower, A. Toia, E. Richardson, Julia Velkovska, R. Pak, N. Kamihara, S. Bathe, L. Mašek, H. Al-Ta'Ani, Tatsuya Chujo, P. Ružička, V. L. Rykov, T. Dahms, P. Constantin, I. Garishvili, S. Chernichenko, F. Wei, A. Taranenko, Agneta Oskarsson, François Fleuret, A. V. Kazantsev, Kazushi Miki, T. Horaguchi, M. Rosati, M. Ouchida, Viktor Riabov, Y. Berdnikov, S. H. Lee, Y. Akiba, T. Ichihara, B. Bassalleck, Y. S. Lai, I. Ravinovich, N. Means, Y. Onuki, C. McKinney, M. Mishra, S. Nagamiya, J. Asai, Brajesh K. Singh, Byoungchoo Park, A. Hadj Henni, Vaclav Vrba, C. Harper, M. Konno, Takahiro Fusayasu, Aaron Angerami, K. B. Lee, Klaus Johannes Reygers, M. Oka, Rui Wei, Shingo Sakai, C. Oakley, M. Bai, A. Drees, P. Kline, Alexander Malakhov, C. L. Woody, A. Berdnikov, K. O. Eyser, A. K. Purwar, K. Fujiwara, Beomkyu Kim, E. C. Aschenauer, L. Tomášek, Wei Xie, T. Kempel, Dong-Hun Kim, Jan Rak, D. Silvermyr, Y. L. Yamaguchi, Y. Miyachi, A. A. Vinogradov, J. T. Mitchell, W. A. Zajc, A. Caringi, S. Kaneti, P. Liebing, C. Y. Chi, R. Lacey, L. S. Zolin, Tae-Yeon Lee, V. Baublis, A. Denisov, Yuki Watanabe, V. Cianciolo, W. J. Park, Christopher Rosen, Jiangyong Jia, Martin Purschke, Y. Goto, P. D. Barnes, R. Seidl, Zhiying You, C. A. Aidala, R. Granier de Cassagnac, Y. Tomita, R. Bennett, M. Kawashima, Vladislav Manko, A. Yanovich, L. Patel, A. Adare, C. Baumann, S. Kametani, M. Slunečka, I. V. Sourikova, H. W. Van Hecke, M. Finger, S. Dairaku, T. L. Thomas, C. P. Singh, Sergey Fokin, D. Broxmeyer, I. J. Choi, D. Roach, K. M. Kijima, T. C. Awes, B. M. Johnson, S. Belikov, R. J. Petti, Kyoichiro Ozawa, T. Liška, Ryugo S. Hayano, H. Qu, O. Zaudtke, A. Morreale, J. S. Bok, Jun Kikuchi, A. Isupov, C. Suire, Y. Riabov, Kenta Shigaki, Z. Fraenkel, M. Nguyen, Tadaaki Isobe, M. Virius, J. Sziklai, Gary Grim, Hideki Hamagaki, K. Aoki, G. David, A. S. Nyanin, K. I. Hahn, K. Hashimoto, K. V. Dharmawardane, R. K. Choudhury, Brian Cole, C. Vale, M. Kurosawa, K. S. Joo, Rachid Nouicer, A. N. Zelenski, M. Proissl, Marisilvia Donadelli, B. S. Chang, V. Bumazhnov, Xingguo Li, P. L. McGaughey, J. Klay, K. Watanabe, C. H. Chen, M. Chiu, N. Apadula, A. Manion, M. Savastio, R. Tanabe, H. Iinuma, D. Layton, K. Shoji, A. Vossen, S. P. Sorensen, A. P.T. Palounek, J. Jin, S. Esumi, W. C. Chang, O. Chvala, E. M. Takagui, D. Sharma, R. Ichimiya, Rushan Han, Seong H. Kim, Vladimir Samsonov, J. G. Lajoie, A. Kravitz, Tamas Ferenc Csorgo, J. L. Nagle, D. John, P. Castera, D. Kleinjan, Eric Appelt, B. Komkov, Norio Saito, Tsutomu Mibe, M. A. L. Leite, H. H. Shim, S. H. Lim, R. Belmont, J. S. Kapustinsky, V. Babintsev, M. Tomášek, G. S. Kyle, James Alexander, R. Averbeck, Byung-Sik Hong, A. Bazilevsky, Philippe Rosnet, Alexandre Lebedev, R. P. Pisani, D. M. Lee, K. Kiriluk, T. Murakami, E. H. Kim, X. Jiang, L. Guo, P. W. Stankus, Alexei Khanzadeev, E. Stenlund, J. B. Choi, S. Sawada, J. Ying, A. Franz, J. H. Bhom, T. V. Moukhanova, R. Vértesi, Takafumi Niida, J. E. Frantz, J. S. Yoo, M. K. Dayananda, Dmitry Blau, M. Wysocki, B. Bannier, E. J. Desmond, M. Togawa, E. Vazquez-Zambrano, C. M. Camacho, Prashant Shukla, J. Park, A. Rakotozafindrabe, S. F. Pate, M. Kasai, Y. Tsuchimoto, Ke. Nakamura, H. Al-Bataineh, R. Armendariz, Y. Iwanaga, S. Motschwiller, I. E. Yushmanov, V. Papavassiliou, and H. Pei

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, High energy, Deuterium, High Energy Physics::Experiment, Rapidity, Atomic physics, Nuclear Experiment, Relativistic Heavy Ion Collider, Nuclear matter, Lower energy
Abstract

The three gamma states, gamma (1S + 2S + 3S), are measured in d + Au and p + p collisions at root s(NN) = 200 GeV and rapidities 1.2 < vertical bar y vertical bar < 2.2 by the PHENIX experiment at the Relativistic Heavy Ion Collider. Cross sections for the inclusive gamma (1S + 2S + 3S) production are obtained. The inclusive yields per binary collision for d + Au collisions relative to those in p + p collisions (R-dAu) are found to be 0.62 +/- 0.26 (stat) +/- 0.13 (syst) in the gold-going direction and 0.91 +/- 0.33 (stat) +/- 0.16 (syst) in the deuteron-going direction. The measured results are compared to a nuclear-shadowing model, EPS09 [Eskola et al., J. High Energy Phys. 04 (2009) 065], combined with a final-state breakup cross section, sigma(br), and compared to lower energy p + A results. We also compare the results to the PHENIX J/psi results [Adare et al., Phys. Rev. Lett. 107, 142301 (2011)]. The rapidity dependence of the observed gamma suppression is consistent with lower energy p + A measurements. DOI: 10.1103/PhysRevC.87.044909

Published
2013
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111. Transverse-momentum dependence of theJ/ψnuclear modification ind+Au collisions atsNN=200GeV

Author

K. Fujiwara, Y. Nakamiya, Y. L. Yamaguchi, Marisilvia Donadelli, V. Bumazhnov, G. Baksay, T. Murakami, R. Tanabe, B. Sahlmueller, Y. J. Kim, H. W. Van Hecke, J. T. Mitchell, S. Sawada, O. Dietzsch, Rushan Han, Alice Mignerey, L. D'Orazio, H. A. Gustafsson, J. Ying, A. Franz, E. T. Atomssa, H. Valle, R. Seidl, Dipanwita Dutta, K. Karatsu, Takao Sakaguchi, Vladislav Manko, A. Enokizono, M. Chiu, P. L. McGaughey, P. Chung, Julia Velkovska, Y. Tanaka, S. Bathe, C. A. Ogilvie, E. Mannel, Agneta Oskarsson, P. Ružička, Y. Berdnikov, Y. Akiba, S. Nagamiya, M. Slunečka, A. D. Frawley, Vaclav Vrba, Klaus Johannes Reygers, Rui Wei, Anne Marie Sickles, A. Kiss, T. K. Hemmick, M. Rosati, K. A. Drees, A. V. Kazantsev, J. M. Durham, Yasuo Miake, Y. J. Mao, Henner Buesching, Steve Edwards, Marcus Hohlmann, Prashant Shukla, S. Huang, Viktor Riabov, L. A. Linden Levy, Beomkyu Kim, A. Datta, T. L. Thomas, T. Ichihara, X. He, I. Ravinovich, S. F. Pate, Ke. Nakamura, H. J. Moon, Vladimir Samsonov, L. Tomášek, Gary Grim, K. V. Dharmawardane, J. H. Kang, J. S. Haggerty, S. P. Sorensen, Alexei Khanzadeev, H. Al-Bataineh, S. Tarafdar, L. Baksay, Takahiro Fusayasu, V. S. Pantuev, Senta Greene, Y. Aramaki, Jiangyong Jia, Y. Goto, E. Stenlund, V. Peresedov, S. Belikov, Alexander Malakhov, W. Holzmann, Robert Vertesi, L. Kochenda, M. Issah, A. T. Basye, J. B. Choi, J. Hamblen, J. Koster, G. R. Young, O. Chvala, Eva Haslum, T. C. Awes, Kyoichiro Ozawa, T. Liška, X. Jiang, D. Kleinjan, Ajit Kumar Mohanty, T. A. Shibata, C. L. Silva, T. Sato, Hongfang Liu, D. E. Fields, Maya Hachiya Shimomura, Y. I. Makdisi, V. Papavassiliou, B. Fadem, E. O'Brien, D. Silvermyr, B. V. Jacak, J. S. Bok, Jun Kikuchi, H. Masui, Ryugo S. Hayano, Y. Riabov, J. G. Lajoie, Kenta Shigaki, Tamas Ferenc Csorgo, K. Okada, L. S. Zolin, W. J. Park, D. Isenhower, S. Afanasiev, A. Toia, R. A. Soltz, M. Bai, M. McCumber, K. N. Barish, J. L. Nagle, I. J. Choi, A. Kravitz, S. Nam, H. En'yo, Christopher Rosen, M. Nguyen, Y. S. Lai, M. J. Leitch, M. J. Tannenbaum, C. Vale, M. Gonin, K. Das, S. Sano, A. Yanovich, J. Newby, Aaron Angerami, Y. Ikeda, B. Azmoun, A. Král, H. Torii, M. K. Dayananda, A. Deshpande, A. S. Nyanin, A. Sukhanov, K. Kurita, A. Kim, S. Rembeczki, W. A. Zajc, M. Wysocki, M. L. Brooks, H. Pereira, J. Hanks, Taku Gunji, H. Gong, J. Seele, Minghui Liu, M. Grosse Perdekamp, Y. Morino, B. Love, Rachid Nouicer, M. Proissl, J. H. Bhom, Y. J. Kwon, F. Kajihara, M. E. Connors, B. Meredith, V. Baublis, A. Denisov, V. Cianciolo, F. Matathias, Kensuke Homma, C. Pinkenburg, A. G. Litvinenko, Sung Keun Park, M. Heffner, D. Hornback, Kenneth Francis Read, E. Richardson, Y. Watanabe, K. S. Sim, K. B. Lee, N. N. Ajitanand, S. Butsyk, John Hill, Sergey Fokin, M. Oka, T. V. Moukhanova, R. Seto, G. Roche, S. Zhou, B. Bassalleck, Dmitry Blau, K. S. Lee, A. Taranenko, I. Danchev, M. Konno, R. Yang, S. D. Rolnick, Toru Sugitate, Takahiro Nakamura, Kazushi Miki, K. Tanida, D. Roach, K. M. Kijima, M. Ouchida, S. Taneja, I. Younus, Brajesh K. Singh, D. McGlinchey, T. Jones, Peter Christiansen, E. J. Desmond, P. Liebing, Susumu Oda, N. Means, K. Imai, K. S. Joo, Xingguo Li, D. Winter, D. Yu Peressounko, A. Durum, Y. Onuki, Zhiying You, E. Vazquez-Zambrano, Catherine Micaela Silvestre, K. Yamaura, Jan Rak, S. Yokkaichi, R. Lacey, R. Bennett, R. Granier de Cassagnac, A. Adare, N. Apadula, M. Kawashima, D. Kawall, François Fleuret, S. Esumi, D. Sharma, R. Ichimiya, M. Finger, S. N. White, M. Kasai, C. Baumann, Y. Tsuchimoto, C. P. Singh, C. L. Woody, A. Berdnikov, Martin Purschke, C. A. Aidala, H. Themann, Deepa Thomas, B. Komkov, H. Qu, Y. Iwanaga, Norio Saito, Tsutomu Mibe, M. A. L. Leite, Zvi Hirsh Citron, Jongmin Lee, K. Nakano, B. M. Johnson, I. E. Yushmanov, A. Caringi, R. Belmont, J. S. Kapustinsky, V. Babintsev, W. E. Sondheim, R. J. Petti, A. Isupov, G. S. Kyle, James Alexander, D. Ivanischev, A. Morreale, J. Sziklai, K. Boyle, P. A. Rukoyatkin, R. Averbeck, Byung-Sik Hong, A. Bazilevsky, Brian Cole, Z. Fraenkel, R. S. Towell, Alexandre Lebedev, I. Garishvili, F. Wei, J. Murata, D. M. Lee, R. K. Choudhury, I. V. Sourikova, C. Y. Chi, D. Lynch, Gerd Joachim Kunde, Hideki Hamagaki, K. Aoki, M. Kurosawa, J. E. Frantz, I. Shein, G. David, K. I. Hahn, A. Taketani, Mate Csanad, M. Nihashi, R. P. Pisani, D. S. Jumper, K. Sedgwick, Y. Fukao, T. Hester, N. Grau, J. Jin, E. M. Takagui, Motoi Inaba, R. M. Wright, T. Dahms, S. Dairaku, K. Watanabe, M. Naglis, H. Pei, Masayasu Ishihara, M. Virius, Manabu Togawa, K. Shoji, K. Sakashita, C. H. Chen, T. Horaguchi, Jason Kamin, P. W. Stankus, S. P. Stoll, S. S.E. Rosendahl, G. Bunce, Charles Maguire, D. Jouan, R. Pak, D. Watanabe, M. D. Malik, E. Vznuzdaev, E. Kistenev, P. Lichtenwalner, C. Oakley, A. Drees, A. Dion, M. I. Nagy, Johannes Peter Wessels, T. Kempel, I. Tserruya, Yu. Efremenko, V. Singh, A. Glenn, Eunja Kim, Alexander Milov, I. Nakagawa, T. Engelmore, O. Drapier, Frank Ellinghaus, E. R. Kinney, D. P. Morrison, S. Campbell, Tatsuya Chujo, Jen-Chieh Peng, Inkyu Park, Xiong Wang, Z. Conesa del Valle, Dong Jo Kim, and A. Veicht

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, 7. Clean energy, 01 natural sciences, Interpretation (model theory), Nuclear physics, Deuterium, 0103 physical sciences, Transverse momentum, High Energy Physics::Experiment, Rapidity, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider
Abstract

We present measured J/psi production rates in d + Au collisions at root s(NN) = 200 GeV over broad ranges of transverse momentum (p(T) = 0-14 GeV/c) and rapidity (-2.2 1) for p(T) > 2 GeV/c. The observed enhancement at negative rapidity has implications for the interpretation of the observed modification in heavy-ion collisions at high p(T). DOI: 10.1103/PhysRevC.87.034904

Published
2013
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112. Anomalous suppression in Pb+Pb collisions at 158×A GeV/c

Author

R. Kossakowski, S. Mourgues, Alberto Masoni, Carlos Lourenco, L. Kluberg, N.S. Topilskaya, N. Willis, Serban Constantinescu, R. Shaoian, A. Devaux, J.-Y. Grossiord, B. Espagnon, F. Ohlsson-Malek, G. L. Usai, G. Dellacasa, Ph. Gorodetzky, Wladyslaw Dabrowski, Sanda Dita, D. Jouan, A. Piccotti, R. Haroutunian, Paolo Giubellino, T. Chambon, I. Chevrot, C. Baglin, M. Masera, E. Chiavassa, X. Tarrago, M. Bedjidian, F.F. Guber, P. Rato-Mendes, S. Serci, J.-R. Pizzi, B. Chaurand, L. Riccati, A. Borhani, V. Boldea, Bruno Alessandro, M. Ceru, C. Gerschel, L. Luquin, Luciano Ramello, J. Astruc, P. Macciotta, A. Bussiere, Marek Idzik, Ermanno Vercellin, A. Musso, J. Fargeix, A. De Falco, M.B. Golubeva, A. Marzari-Chiesa, C. Racca, F. Bellaiche, M.S. Sartori, P. Guaita, S. Ramos, P. Saturnini, P. Force, A. Romana, A. Baldit, Calin Alexa, G. Puddu, P. Petiau, M. Gallio, A. Guichard, Y. Le Bornec, G. Landaud, P. Sonderegger, M.C. Abreu, François Fleuret, Y.K. Gavrilov, T.L. Karavitcheva, M. Gonin, Enrico Scomparin, P. Bordalo, Alexey Kurepin, S. Beole, W. L. Prado Da Silva, J. Castor, N. De Marco, Corrado Cicalo, S. Silva, V. Capony, Brigitte Cheynis, O. Drapier, and Petar Temnikov

Subjects
Physics, Nuclear and High Energy Physics, Analytical chemistry, Drell–Yan process
Abstract

Cross sections for J ψ,ψ′ and Drell-Yan production in Pb+Pb collisions at 158×A GeV/c are presented and compared with results obtained by the NA38 and NA51 collaborations. The Pb+Pb data have been collected by the NA50 collaboration using the NA38 dimuon spectrometer. The Drell-Yan mechanism is found to scale as (Aprojectile · Btarget) in p+Btarget and Aprojectile+Btarget collisions including Pb+Pb collisions. Regarding J ψ , an anomalous suppression is observed in Pb+Pb collisions with respect to the suppression observed in p+Btarget, O+Btarget and S+U collisions. The cross section ratios ψ′ ( J ψ ) are similar in Pb+Pb and S+U collisions.

Published
1996
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113. ϕ, ρ andω production in collisions induced by deuteron and heavy ions at 200 A GeV/c

Author

A. Borhani, V. Boldea, S. Silva, J. Astruc, R. Kossakowski, Sanda Dita, D. Jouan, G. Landaud, C. Baglin, N. De Marco, G. Bonazzola, M. Ceru, A. Bussiere, P. Rato-Mendes, A. Piccotti, X. Tarrago, A. Guichard, S. Serci, A. Romana, Y. Le Bornec, P. Guaita, Calin Alexa, J. R. Pizzi, M. Gonin, W. Dabrowski, M. Gallio, J. Castor, F.F. Guber, François Fleuret, S. Mourgues, M.C. Abreu, R. Haroutunian, B. Chaurand, Petar Temnikov, Ph. Gorodetzky, Alberto Masoni, Luciano Ramello, T.L. Karavitcheva, C. Gerschel, Y.K. Gavrilov, A. Baldit, M.B. Golubeva, Alexey Kurepin, F. Ohlsson-Malek, J. Fargeix, A. Marzari-Chiesa, G. Dellacasa, P. Petiau, Carlos Lourenco, S. Ramos, Enrico Scomparin, O. Drapier, T. Chambon, Ermanno Vercellin, P. Sonderegger, L. Kluberg, N.S. Topilskaya, L. Luquin, C. Racca, W.L. Prado da Silva, L. Riccati, M. Masera, F. Bellaiche, Paolo Giubellino, A. De Falco, S. Beole, C. Cicalo, Na Collaborations, R. Shaoian, Bruno Alessandro, J.-Y. Grossiord, G. Puddu, I. Chevrot, Bruno Espagnon, Serban Constantinescu, Marek Idzik, P. Bordalo, A. Devaux, P. Macciotta, A. Musso, P. Force, G. L. Usai, E. Chiavassa, V. Capony, Brigitte Cheynis, M. Bedjidian, P. Saturnini, and N. Willis

Subjects
Nuclear physics, Physics, Nuclear reaction, Nuclear and High Energy Physics, Meson, Hadron, General Physics and Astronomy, Transverse mass, Strangeness production, Elementary particle, Nucleon, Quarkonium
Abstract

The production of low mass dimuons has been measured in d-C, d-U and S-U collisions at 200 GeV per nucleon, and in Pb-Pb collisions at 160 GeV per nucleon. Theϕ, ρ andω productions in S-U collision [1, 2] are extracted from a new set of data with increased statistic, and are throughϕ/(ω+ρ) ratio compared to first results on deuteron induced production. These new analyses are presented in the limitedM T domain of recent Pb-Pb measurement whose preliminary results are also presented.

Published
1996
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114. Muon pair and vector meson cross-sections in p-W and SU collisions at 200 GeV/nucleon

Author

R. Ferreira, Carlos Lourenco, A. Baldisseri, J. Fargeix, A. Romana, L. Kluberg, J. Castor, S. Papillon, B. Chaurand, Luis Peralta, C. Gerschel, X. Tarrago, Ph. Gorodetzky, A. Bussière, C. Racca, R. Kossakowski, J.M. Gago, E. Descroix, P. Bordalo, A. Devaux, P. Liaud, T. Chambon, O. Drapier, Rachid Mazini, G. Landaud, J.-R. Pizzi, Didier Contardo, S. Silva, M. Bedjidian, Joao Varela, M.C. Abreu, A. Guichard, B. Espagnon, C. Baglin, R. Haroutunian, P. Force, J.-Y. Grossiord, P. Sonderegger, J. P. Guillaud, S. Ramos, A. Baldit, and D. Jouan

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Particle physics, Muon, Pair production, Transverse momentum, Rapidity, Vector meson, Nucleon, Power law
Abstract

Muon pair production is studied in p-W and SU collisions at 200 GeV per nucleon, as a function of transverse momentum PTμμ. The inclusive ϱ+ω and Φ differential cross-sections dσ dP T are measured in the dimuon decay channel, for PT ≥ 0.6 GeV/c, in the central rapidity region, 3.0≤ y ≤ 4.0. Assuming the power law A-dependence σ = σ0(Abeam·Atarget)α, the study of the integrated cross-sections for p-W and SU collisions leads to αϱ+ω = 1.00±0.02±0.07 and αΦ = 1.23±0.03±0.05, showing clear evidence of Φ enhancement in SU interactions as compared to p-W collisions.

Published
1996
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115. Production of ϱ + ω and Φ in p-W and SU collisions at 200 GeV/nucleon

Author

B. Espagnon, C. Baglin, A. Romana, M.C. Abreu, S. Papillon, G. Landaud, Ph. Gorodetzky, S. Silva, J. Castor, X. Tarrago, A. Guichard, B. Chaurand, Joao Varela, O. Drapier, M. Bedjidian, C. Gerschel, R. Kossakowski, C. Racca, D. Jouan, S. Ramos, A. Baldit, A. Bussière, R. Ferreira, E. Descroix, P. Force, J. Fargeix, P. Sonderegger, J.-R. Pizzi, J.M. Gago, Didier Contardo, Luis Peralta, Carlos Lourenco, L. Kluberg, T. Chambon, Rachid Mazini, A. Baldisseri, P. Liaud, P. Bordalo, A. Devaux, J.-Y. Grossiord, J. P. Guillaud, and R. Haroutunian

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Transverse momentum, Energy density, Transverse mass, Rapidity, Nuclear Experiment, Nucleon
Abstract

The transverse mass differential cross-sections for the ϱ + ω and Φ resonances is obtained, in the central rapidity region, in p - W and S  U interactions at 200 GeV/nucleon. The measured ϱ + ω and Φ temperatures are ∼ 15% higher in S  U as compared to p - W collisions. The ratio of cross-sections times branching ratios into the dimuon channel B Φ σ Φ (B ϱ σ ϱ + B ω σ ω ) is studied as a function of the energy density reached in the collision and of the dimuon transverse momentum. The measured ratio is 2 to 3 times larger in S  U than in p - W collisions and an enhancement is observed in S  U interactions with increasing energy density.

Published
1996
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116. In Situ Quantitative Proton Nuclear Magnetic Resonance Spectroscopy Analysis Of Milk Fat Fusion

Author

Hervé This, D. Jouan-Rimbaud-Bouveresse, F. Khifer, J. Perez, Romain Bouteille, Bruno Lecanu, Ingénierie Procédés Aliments (GENIAL), Institut National de la Recherche Agronomique (INRA)-AgroParisTech-Conservatoire National des Arts et Métiers [CNAM] (CNAM)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), Yoplait, Génie industriel alimentaire (GENIAL), Institut National de la Recherche Agronomique (INRA)-AgroParisTech-Conservatoire National des Arts et Métiers [CNAM] (CNAM), AgroParisTech, Institut National de la Recherche Agronomique (INRA)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-AgroParisTech-Conservatoire National des Arts et Métiers [CNAM] (CNAM), John van Duynhoven, Peter S Belton, G A Webb, Henk van As, and ProdInra, Archive Ouverte

Subjects
chemistry.chemical_classification, [SDV]Life Sciences [q-bio], digestive, oral, and skin physiology, Nucleation, food and beverages, Fatty acid, equipment and supplies, [SDV] Life Sciences [q-bio], chemistry, Casein, Proton NMR, Melting point, Composition (visual arts), Food science, human activities, Flavor, Alkyl
Abstract

In situ quantitative proton nuclear magnetic resonance spectroscopy, a fast and easy to implement method, was applied to the study of milk fat melting between 20.00 °C and 70.00 °C. Several milk fat fractions (high melting point, intermediate melting point and low melting point) were investigated, both as isolated fractions and inside dairy gels. Two “fusion indexes” FCH3FAR and FCH2FAR were defined from methylene and methyl protons resonances of fatty acid residues in order to determine the liquid fat proportion and the composition of triglycerides (TG) (in terms of length of alkyl chains of TG) for a temperature T. Modeling the variation of these indexes in function of temperature by a Gauss error function leads to the determination of the distribution of TG in function of their fusion temperature. Statistical tests performed on experimental data showed no significant differences between isolated milk fat and milk fat inside a dairy gel in terms of melting behaviour. In this assumption, it has to be deduced that nucleation sites brought by dairy gel casein network have no significant influence on the fat melting behaviour, especially on the liquid fat proportion. This new method of direct analysis of dairy gels helps to understand the influence of the quantity and composition of TG on the making of milk gels as well as on the release of milk fat flavor compounds. It can also be used to study fat melting behaviour in other low-fat content food products with no preliminary fat extraction, as milk, cheese, chocolate….

Published
2013
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117. Independent Components Analysis with the JADE algorithm

Author

D. Jouan-Rimbaud Bouveresse, Douglas N. Rutledge, Ingénierie Procédés Aliments (GENIAL), Institut National de la Recherche Agronomique (INRA)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-AgroParisTech-Conservatoire National des Arts et Métiers [CNAM] (CNAM), ProdInra, Archive Ouverte, and Institut National de la Recherche Agronomique (INRA)-AgroParisTech-Conservatoire National des Arts et Métiers [CNAM] (CNAM)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)

Subjects
Joint Approximate Diagonalization of Eigenmatrices (JADE), [SDV.SA]Life Sciences [q-bio]/Agricultural sciences, Computer science, [SDV]Life Sciences [q-bio], Multiway data array, Principal Components Analysis (PCA), JADE (programming language), 02 engineering and technology, 01 natural sciences, Three-way data, Analytical Chemistry, Chemometrics, Parallel Factor Analysis (PARAFAC), Interpretable signal, Spectroscopy, Independence (probability theory), computer.programming_language, Complex data set, ANALYTICAL-CHEMISTRY, 010401 analytical chemistry, Independent Components Analysis (ICA), Independence, 021001 nanoscience & nanotechnology, Independent component analysis, 0104 chemical sciences, Data set, [SDV] Life Sciences [q-bio], RESOLUTION, Principal component analysis, 0210 nano-technology, computer, Algorithm, Three way data
Abstract

Independent Components Analysis (ICA) is a relatively recent method, with an increasing number of applications in chemometrics. Of the many algorithms available to compute ICA parameters, the Joint Approximate Diagonalization of Eigenmatrices (JADE) algorithm is presented here in detail. Three examples are used to illustrate its performance, and highlight the differences between ICA results and those of other methods, such as Principal Components Analysis. A comparison with Parallel Factor Analysis (PARAFAC) is also presented in the case of a three-way data set to show that ICA applied on an unfolded high-order array can give results comparable with those of PARAFAC. (c) 2013 Elsevier Ltd. All rights reserved.

Published
2013
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118. Calibration line adjustment to facilitate the use of synthetic calibration samples in near-infrared spectrometric analysis of pharmaceutical production samples

Author

D. Jouan-Rimbaud, M.S. Khots, D.L. Massart, I.R. Last, and K.A. Prebble

Subjects
Active ingredient, Chemistry, business.industry, Calibration (statistics), Analytical chemistry, Feature selection, Biochemistry, Dosage form, Analytical Chemistry, Chemometrics, Principal component analysis, Linear regression, Environmental Chemistry, Batch production, Process engineering, business, Spectroscopy
Abstract

A method is proposed to build a reliable and stable model for the quantitative determination of pharmaceutical tablets, where the active ingredient concentration of production batches does not vary enough to ensure a stable calibration model. Therefore, some synthetic tablets based on the same formula, but with an extended concentration range of the active ingredient, are produced and used to build a calibration model. This model is then adjusted by the use of production samples. The model used is based on multiple linear regression and feature selection. Validation by predicting new independent production samples shows that this procedure can be used for a satisfactory determination of the active ingredient.

Published
1995
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119. Comparison of multivariate methods based on latent vectors and methods based on wavelength selection for the analysis of near-infrared spectroscopic data

Author

D. Jouan-Rimbaud, B. Walczak, D.L. Massart, I.R. Last, and K.A. Prebble

Subjects
Multivariate statistics, Calibration (statistics), Chemistry, business.industry, Feature selection, Pattern recognition, Biochemistry, Analytical Chemistry, Chemometrics, Principal component analysis, Statistics, Linear regression, Environmental Chemistry, Principal component regression, Artificial intelligence, business, Spectroscopy, Selection (genetic algorithm)
Abstract

Comparison of several calibration methods (principal component regression (PCR), partial least-squares, multiple linear regression), with and without feature selection, applied on near-infrared spectroscopic data is presented for a pharmaceutical application. It is shown that PCR with selection of principal components instead of the usual top-down approach yields simpler and better models. As feature selection methods, selection of wavelengths correlated with concentration, with large covariance with concentration, with high loadings on the important principal components, and according to a method proposed by Brown, are considered. The presented results suggests that feature selection can improve multivariate calibration.

Published
1995
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120. Ψ′ and J/Ψ production in p-W, p-U and S-U interactions at 200 GeV/nucleon

Author

P. Liaud, C. Barriere, P. Force, B. Espagnon, R. Haroutunian, R. Kossakowski, J. Castor, L. Luquin, J.-R. Pizzi, T. Chambon, X. Tarrago, O. Drapier, B. Chaurand, R. Mandry, P. Bordalo, C. Gerschel, S. Ramos, M.C. Abreu, Didier Contardo, A. Devaux, A. Guichard, Carlos Lourenco, L. Kluberg, G. Landaud, M. Bedjidian, C. Baglin, C. Racca, Luis Peralta, P. Sonderegger, Joao Varela, S. Silva, R. Ferreira, Rachid Mazini, J.-Y. Grossiord, J.P. Guillaud, P. Saturnini, F. Ohlsson-Malek, B. Ronceux, A. Bussiere, D. Jouan, D. Lazic, J. Fargeix, E. Descroix, A. Romana, and Ph. Gorodetzky

Subjects
inorganic chemicals, Physics, Nuclear physics, Nuclear and High Energy Physics, Particle physics, chemistry, digestive, oral, and skin physiology, chemistry.chemical_element, Tungsten, Uranium, Nucleon, respiratory tract diseases
Abstract

Ψ′ and J/Ψ yields are compared in p-W, p-U and S-U interactions at 200 GeV/nucleon. Their ratio decreases from proton-t to sulphur-induced reactions. It also decreases in sulphur-induced reactions from peripheral to central collisions. This result could indicate that the Ψ′ and J/Ψ suppression mechanisms have different origins in p- and S-induced reactions.

Published
1995
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121. New results on J/ψ from the NA50 experiment

Author

A. Piccotti, João Cruz, Roberta Arnaldi, J.-R. Pizzi, F. Prino, A. Bussiere, Ermanno Vercellin, Paolo Giubellino, H.R. Gulkanyan, Helena Santos, M. Mac Cormick, P. Petiau, A. Marzari-Chiesa, W.L. Prado da Silva, F. Sigaudo, F.F. Guber, Y.K. Gavrilov, N. Willis, S. Ramos, O. Drapier, P. Sonderegger, G. Puddu, Luciano Ramello, A. Devaux, M.B. Golubeva, Enrico Scalas, G. L. Usai, Alexey Kurepin, G. Dellacasa, Alberto Masoni, Sanda Dita, D. Jouan, P. Rato Mendes, S. Serci, C. Quintans, M. Atayan, N. De Marco, T. Claudino, B. Chaurand, X. Tarrago, A. Romana, C. Gerschel, Pietro Cortese, Calin Alexa, M. Bedjidian, C. Castanier, Brigitte Cheynis, S. Grigorian, Mauro Gallio, Carlos Lourenco, P. Bordalo, R. Hakobyan, V. Boldea, Enrico Scomparin, L. Kluberg, N.S. Topilskaya, A. De Falco, J.-Y. Grossiord, A. Guichard, Stefania Beole, T. Wu, M. Gonin, L. Capelli, A. Musso, P. Force, Mario Sitta, Marek Idzik, P. Saturnini, J. Fargeix, C. Baglin, P. Macciotta, Massimo Masera, E. Chiavassa, Ruben Shahoyan, M. P. Comets, B. Espagnon, R. Haroutunian, G. Borges, T.L. Karavitcheva, Corrado Cicalo, Marco Monteno, Y. Le Bornec, L. Riccati, J. Castor, S. Borenstein, L. Villatte, A. Baldit, Serban Constantinescu, Bruno Alessandro, and A.A. Grigorian

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Muon, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Nuclear Theory, Plasma, 01 natural sciences, Atomic and Molecular Physics, and Optics, Charged particle, Ion, Renormalization, Nuclear physics, 0103 physical sciences, Quark–gluon plasma, High Energy Physics::Experiment, Heavy ion, Nuclear Experiment, 010306 general physics
Abstract

The NA50 experiment studies the production of J/γ in Pb+Pb collisions. The anomalous J/ψ suppression in relativistic heavy ion collisions, considered an unambiguous signature for the formation of a quark gluon plasma, is studied in the dimuon channel, using as reference the Drell-Yan muon pairs. Preliminary results from the analysis of the 2000 data, with the target region vacuum, are presented and compared to an update of those obtained from previous data samples.

Published
2003
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122. Cold-Nuclear-Matter Effects on Heavy-Quark Production ind+AuCollisions atsNN=200 GeV

Author

H. Themann, M. Grosse Perdekamp, T. Hester, M. E. Connors, Sung Keun Park, S. Dairaku, N. N. Ajitanand, K. A. Drees, Marisilvia Donadelli, Takahiro Nakamura, T. Murakami, K. Tanida, Gerd Joachim Kunde, I. Shein, N. Grau, V. Bumazhnov, Charles Maguire, T. Jones, Peter Christiansen, M. Virius, Susumu Oda, Manabu Togawa, H. Pei, K. Sedgwick, Y. Onuki, S. P. Sorensen, E. Kistenev, D. Winter, D. Yu Peressounko, P. Lichtenwalner, M. Rosati, Jan Rak, A. Durum, Motoi Inaba, R. Lacey, C. H. Chen, Alexander Milov, I. Nakagawa, O. Chvala, R. Tanabe, Y. Tanaka, R. Granier de Cassagnac, A. Adare, E. Mannel, Catherine Micaela Silvestre, K. Yamaura, R. M. Wright, T. Engelmore, A. Deshpande, K. Das, Y. Ikeda, T. L. Thomas, H. A. Gustafsson, H. J. Moon, L. Baksay, X. Jiang, Dmitry Blau, Y. J. Kwon, Jiangyong Jia, Y. Goto, Jongmin Lee, J. G. Lajoie, Aram Kim, Ryugo S. Hayano, Y. Riabov, Maya Hachiya Shimomura, O. Drapier, Frank Ellinghaus, C. Pinkenburg, D. Kleinjan, Kenta Shigaki, Hongfang Liu, D. E. Fields, S. Sawada, Y. Watanabe, Masamichi Ishihara, M. Nguyen, I. J. Choi, A. Kravitz, C. Oakley, Y. I. Makdisi, A. Drees, C. Baumann, C. P. Singh, E. R. Kinney, D. P. Morrison, Senta Greene, B. V. Jacak, M. Nihashi, S. Campbell, A. Taketani, Minghui Liu, A. S. Nyanin, I. Younus, M. Gonin, Rachid Nouicer, G. Roche, K. S. Sim, M. Proissl, D. S. Jumper, J. Ying, A. Franz, A. T. Basye, M. McCumber, T. Dahms, Rushan Han, P. Ružička, E. J. Desmond, D. Watanabe, M. Heffner, Kenneth Francis Read, V. S. Pantuev, B. M. Johnson, B. Fadem, E. O'Brien, M. D. Malik, R. P. Pisani, Tatsuya Chujo, T. Ichihara, K. Watanabe, K. Shoji, C. L. Woody, A. Berdnikov, M. Chiu, R. Yang, O. Dietzsch, E. T. Atomssa, A. Sukhanov, K. Kurita, T. Csörgå, J. Hanks, H. Valle, C. A. Ogilvie, E. Vznuzdaev, S. W. Nam, A. V. Kazantsev, J. Hamblen, H. Pereira, A. Caringi, S. Taneja, Dipanwita Dutta, T. K. Hemmick, I. Ravinovich, T. Horaguchi, E. Vazquez-Zambrano, P. W. Stankus, J. M. Durham, R. J. Petti, Viktor Riabov, Y. Morino, M. Naglis, Jen-Chieh Peng, Yasuo Miake, Vladimir Samsonov, G. S. Kyle, Julia Velkovska, K. Imai, M. Bai, L. Tomášek, M. J. Tannenbaum, I. V. Sourikova, James Alexander, Gary Grim, K. Okada, A. Enokizono, J. Sziklai, L. Kochenda, M. Issah, K. V. Dharmawardane, H. Torii, K. Karatsu, Inkyu Park, R. Averbeck, Byung-Sik Hong, A. Bazilevsky, H. En'yo, Anne Marie Sickles, P. Chung, R. Pak, M. J. Leitch, K. Sakashita, Xiong Wang, Z. Conesa del Valle, Dong Jo Kim, Brian Cole, S. Yokkaichi, M. Kasai, T. C. Awes, Kyoichiro Ozawa, T. Liška, Alexandre Lebedev, M. K. Dayananda, Zhiying You, D. M. Lee, R. Bennett, M. Kurosawa, M. Ouchida, M. Wysocki, J. Newby, Jason Kamin, S. Rembeczki, J. S. Bok, Jun Kikuchi, K. B. Lee, M. Csanad, M. Kawashima, S. P. Stoll, N. Means, A. Veicht, G. R. Young, H. Qu, J. L. Nagle, Y. Tsuchimoto, Y. Iwanaga, A. Datta, M. Finger, I. Tserruya, S. S.E. Rosendahl, G. Bunce, Yu. Efremenko, Prashant Shukla, B. Komkov, V. Singh, Taku Gunji, H. Gong, J. H. Kang, J. Seele, J. S. Haggerty, Hideki Hamagaki, K. Aoki, D. Hornback, G. David, S. F. Pate, K. I. Hahn, M. Slunečka, Norio Saito, Tsutomu Mibe, I. E. Yushmanov, M. A. L. Leite, F. Kajihara, Alice Mignerey, Ke. Nakamura, H. Al-Bataineh, P. L. McGaughey, D. Jouan, L. D'Orazio, J. Jin, A. Glenn, A. Dion, M. I. Nagy, E. M. Takagui, S. Butsyk, R. Belmont, A. Taranenko, D. Roach, K. M. Kijima, Eunja Kim, R. S. Towell, S. Zhou, Takao Sakaguchi, Johannes Peter Wessels, Aaron Angerami, Kazushi Miki, V. Papavassiliou, I. Garishvili, F. Wei, Y. S. Lai, T. Kempel, S. D. Rolnick, Xingguo Li, W. A. Zajc, A. D. Frawley, Brajesh K. Singh, V. Baublis, A. Denisov, V. Cianciolo, Ajit Kumar Mohanty, C. Y. Chi, Sergey Fokin, T. A. Shibata, C. L. Silva, T. Sato, S. Huang, Beomkyu Kim, W. Holzmann, S. Tarafdar, D. Isenhower, A. Toia, J. E. Frantz, Eva Haslum, J. Murata, Alexei Khanzadeev, E. Stenlund, J. B. Choi, J. H. Bhom, T. V. Moukhanova, J. S. Kapustinsky, V. Babintsev, B. Azmoun, Y. J. Mao, A. Král, M. Oka, K. S. Lee, P. Liebing, K. S. Joo, N. Apadula, S. Esumi, D. Sharma, R. Ichimiya, Martin Purschke, A. Morreale, Z. Fraenkel, R. K. Choudhury, K. Fujiwara, K. N. Barish, S. Sano, Y. L. Yamaguchi, M. L. Brooks, H. W. Van Hecke, X. He, Y. Nakamiya, D. Lynch, Y. Aramaki, Robert Vertesi, S. Bathe, Agneta Oskarsson, B. Meredith, John Hill, Toru Sugitate, G. Baksay, J. Koster, Y. Berdnikov, Y. Akiba, François Fleuret, S. Nagamiya, H. Masui, B. Sahlmueller, Vaclav Vrba, Klaus Johannes Reygers, Y. J. Kim, B. Love, Rui Wei, S. N. White, J. T. Mitchell, R. Seidl, Deepa Thomas, Vladislav Manko, A. Kiss, Zvi Hirsh Citron, S. Belikov, Henner Buesching, Steve Edwards, K. Nakano, C. Vale, R. Seto, Marcus Hohlmann, Christine Angela Aidala, W. E. Sondheim, D. Ivanischev, L. A. Linden Levy, F. Matathias, Kensuke Homma, E. Richardson, I. Danchev, K. Boyle, B. Bassalleck, M. Konno, Takahiro Fusayasu, D. Silvermyr, W. J. Park, Christopher Rosen, A. Yanovich, R. A. Soltz, Y. Fukao, and D. Kawall

Subjects
Quark, Physics, Particle physics, Meson, 010308 nuclear & particles physics, Nuclear Theory, High Energy Physics::Phenomenology, Hadron, General Physics and Astronomy, Electron, Nuclear matter, 01 natural sciences, 7. Clean energy, Nuclear physics, 0103 physical sciences, D meson, High Energy Physics::Experiment, Charm (quantum number), Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider
Abstract

The PHENIX experiment has measured electrons and positrons at midrapidity from the decays of hadrons containing charm and bottom quarks produced in d+Au and p+p collisions at sqrt[S(NN)]=200 GeV in the transverse-momentum range 0.85 ≤ p(T)(e) ≤ 8.5 GeV/c. In central d+Au collisions, the nuclear modification factor R(dA) at 1.5

Published
2012
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123. J/ψsuppression at forward rapidity in Au+Au collisions atsNN=39and 62.4 GeV

Author

C. L. Woody, A. Berdnikov, S. Dairaku, K. S. Sim, Maya Hachiya Shimomura, R. S. Hollis, A. V. Kazantsev, Y. I. Makdisi, A. Sen, A. Deshpande, Charles Maguire, V. S. Pantuev, M. Sano, M. Virius, E. T. Atomssa, R. Yang, S. Choi, K. V. Dharmawardane, Kiyoshi Tanida, S. Taneja, E. Kistenev, L. Tomášek, C. H. Chen, M. J. Tannenbaum, T. Kempel, A. Garishvili, I. V. Sourikova, A. Kiss, S. Kaneti, H. Torii, Y. Tanaka, E. Mannel, M. Javani, H. J. Moon, A. Manion, Bum-Hoon Lee, J. Sun, I. Ravinovich, Henner Buesching, Y. Nakamiya, Y. Tsuchimoto, Y. Watanabe, I. Younus, S. Butsyk, L. Patel, B. Azmoun, K. Okada, M. Kurosawa, E. Tennant, M. Bai, M. Rosati, H. Pei, Y. Ikeda, K. Karatsu, H. Iinuma, Dmitry Blau, X. Gong, Y. Fukao, M. Wysocki, H. J. Kim, L. A. Linden Levy, Atsushi Takahara, A. Král, E. C. Aschenauer, D. E. Fields, Y. Hori, Anne Marie Sickles, B. Bannier, M. J. Leitch, K. Gainey, B. V. Jacak, R. Akimoto, T. C. Awes, Kyoichiro Ozawa, B. Meredith, K. O. Eyser, Alice Mignerey, B. Sahlmueller, T. Hester, D. Kotchetkov, K. A. Drees, T. Murakami, Aaron Angerami, Y. L. Yamaguchi, L. D'Orazio, S. Miyasaka, Zhiying You, M. McCumber, C. Pinkenburg, Y. J. Kim, Hideki Hamagaki, K. Aoki, E. J. Desmond, G. David, X. Jiang, J. Klatsky, H. W. Van Hecke, J. T. Mitchell, R. Seidl, Vladislav Manko, Marisilvia Donadelli, V. Bumazhnov, W. A. Zajc, John Hill, J. Hanks, G. Roche, Sung Keun Park, M. Ouchida, Takao Sakaguchi, M. Finger, Y. J. Kwon, K. Watanabe, M. Slunečka, E. M. Takagui, Senta Greene, Toru Sugitate, A. Enokizono, N. Grau, Yosuke Watanabe, K. Shoji, P. Kline, J. H. Kang, M. Leitgab, V. Baublis, A. Denisov, N. N. Ajitanand, B. Lewis, V. Cianciolo, J. Imrek, C. Vale, P. W. Stankus, S. Sawada, E. Vazquez-Zambrano, A. Nederlof, J. S. Haggerty, S. R. Lee, A. D. Frawley, Motoi Inaba, Jiangyong Jia, Y. Goto, R. S. Towell, B. Fadem, E. O'Brien, J. Ying, A. Franz, Takahiro Nakamura, D. McGlinchey, Jan Rak, I. Garishvili, S. Bathe, M. Chiu, Jongmin Lee, C. A. Ogilvie, R. Lacey, Christine Angela Aidala, R. A. Soltz, M. Sarsour, Mate Csanad, A. Iordanova, Agneta Oskarsson, Y. Berdnikov, H. Qu, F. Wei, M. Stepanov, Minghui Liu, S. Tarafdar, R. Granier de Cassagnac, Y. Akiba, C. McKinney, Kisung Lee, T. K. Hemmick, A. Durum, Sergey Fokin, S. Huang, M. Grosse Perdekamp, A. Datta, H. Asano, S. Nagamiya, J. S. Kang, A. Adare, M. Nihashi, M. Kasai, Eva Haslum, Martin Purschke, Vaclav Vrba, Kensuke Homma, R. Reynolds, Ryugo S. Hayano, E. Richardson, M. E. Connors, Rui Wei, D. Kawall, M. Tomášek, G. S. Kyle, D. Kleinjan, Taku Gunji, K. I. Hahn, James Alexander, B. Bassalleck, François Fleuret, H. Themann, J. M. Durham, Yasuo Miake, Kenneth Francis Read, A. Taketani, Prashant Shukla, R. P. Pisani, Y. Riabov, Kenta Shigaki, I. E. Yushmanov, Byung-Sik Hong, A. Bazilevsky, T. Ichihara, C. Y. Chi, S. F. Pate, Alexandre Lebedev, Peter Christiansen, M. Issah, J. Murata, Y. S. Lai, S. H. Lee, A. S. Nyanin, Ke. Nakamura, L. Guo, Alexei Khanzadeev, D. M. Lee, Gerd Joachim Kunde, Takahiro Fusayasu, D. Winter, S. Baumgart, H. A. Gustafsson, D. Yu Peressounko, I. Shein, S. Masumoto, R. K. Choudhury, Vladimir Samsonov, Christine Nattrass, Rachid Nouicer, A. N. Zelenski, M. Proissl, B. Komkov, T. Todoroki, E. Stenlund, S. D. Rolnick, M. S. Daugherity, C. P. Singh, K. S. Joo, S. Motschwiller, K. Sedgwick, Norio Saito, Tsutomu Mibe, J. B. Choi, Mihael Makek, M. A. L. Leite, B. M. Johnson, S. Wolin, R. Pak, V. Papavassiliou, Ajit Kumar Mohanty, T. A. Shibata, C. L. Silva, D. Silvermyr, P. L. McGaughey, Filip Krizek, S. H. Lim, R. J. Petti, A. Ster, Tamas Ferenc Csorgo, N. Apadula, Dipak Kumar Mishra, R. Belmont, J. S. Kapustinsky, S. Yokkaichi, Viktor Riabov, Tomofumi Nagae, V. Babintsev, S. Edwards, J. L. Nagle, A. Vossen, P. Castera, Byoungchoo Park, D. Isenhower, O. Dietzsch, A. Taranenko, J. Sziklai, S. Esumi, A. Drees, D. Sharma, T. Horaguchi, Brian Cole, Brajesh K. Singh, Y. Komatsu, T. V. Moukhanova, D. Kotov, C. Gal, Julia Velkovska, A. Yanovich, Jason Kamin, M. Soumya, Tomoya Tsuji, M. Mendoza, S. P. Stoll, S. N. White, D. Jouan, Zvi Hirsh Citron, K. Nakano, K. B. Kim, W. E. Sondheim, D. Ivanischev, K. Boyle, I. Tserruya, M. Gonin, A. Sukhanov, K. Kurita, H. Pereira, Yu. Efremenko, V. Singh, C. O. Kim, K. B. Lee, Y. Miyachi, A. Dion, M. I. Nagy, L. Ding, D. Roach, K. M. Kijima, D. Watanabe, A. Glenn, E. Vznuzdaev, K. N. Barish, K. Hashimoto, Eunja Kim, Jen-Chieh Peng, J. E. Frantz, S. P. Sorensen, Beomkyu Kim, X. Bing, O. Chvala, Inkyu Park, M. Vargyas, M. L. Brooks, Xiong Wang, Dong Jo Kim, J. G. Lajoie, T. Hachiya, B. Love, I. J. Choi, Alexander Milov, I. Nakagawa, Young-Ki Kim, T. Engelmore, N. Novitzky, O. Drapier, E. R. Kinney, D. P. Morrison, S. Campbell, B. H. Kang, H. Al-Ta'Ani, Tatsuya Chujo, R. Seto, X. He, Y. Aramaki, Robert Vertesi, J. Koster, and A. Veicht

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Transverse momentum, Theoretical models, Rapidity, Invariant (mathematics), Nuclear Experiment
Abstract

We present measurements of the J/psi invariant yields in root s(NN) = 39 and 62.4 GeV Au + Au collisions at forward rapidity (1.2 < vertical bar y vertical bar < 2.2). Invariant yields are presented as a function of both collision centrality and transverse momentum. Nuclear modifications are obtained for central relative to peripheral Au + Au collisions (R-CP) and for various centrality selections in Au + Au relative to scaled p + p cross sections obtained from other measurements (R-AA). The observed suppression patterns at 39 and 62.4 GeV are quite similar to those previously measured at 200 GeV. This similar suppression presents a challenge to theoretical models that contain various competing mechanisms with different energy dependencies, some of which cause suppression and others enhancement. DOI: 10.1103/PhysRevC.86.064901

Published
2012
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124. Erratum: Measurement of transverse single-spin asymmetries forJ/ψproduction in polarizedp+pcollisions ats=200 GeV[Phys. Rev. D82, 112008 (2010)]

Author

A. Adare, S. Afanasiev, C. Aidala, N. N. Ajitanand, Y. Akiba, H. Al-Bataineh, J. Alexander, H. Al-Ta’ani, A. Angerami, K. Aoki, N. Apadula, L. Aphecetche, Y. Aramaki, J. Asai, E. T. Atomssa, R. Averbeck, T. C. Awes, B. Azmoun, V. Babintsev, M. Bai, G. Baksay, L. Baksay, A. Baldisseri, K. N. Barish, P. D. Barnes, B. Bassalleck, A. T. Basye, S. Bathe, S. Batsouli, V. Baublis, C. Baumann, A. Bazilevsky, S. Belikov, R. Belmont, R. Bennett, A. Berdnikov, Y. Berdnikov, J. H. Bhom, A. A. Bickley, D. S. Blau, J. G. Boissevain, J. S. Bok, H. Borel, N. Borggren, K. Boyle, M. L. Brooks, H. Buesching, V. Bumazhnov, G. Bunce, S. Butsyk, C. M. Camacho, S. Campbell, A. Caringi, B. S. Chang, W. C. Chang, J.-L. Charvet, C.-H. Chen, S. Chernichenko, C. Y. Chi, M. Chiu, I. J. Choi, J. B. Choi, R. K. Choudhury, P. Christiansen, T. Chujo, P. Chung, A. Churyn, O. Chvala, V. Cianciolo, Z. Citron, B. A. Cole, Z. Conesa del Valle, M. Connors, P. Constantin, M. Csanád, T. Csörgő, T. Dahms, S. Dairaku, I. Danchev, K. Das, A. Datta, G. David, M. K. Dayananda, A. Denisov, D. d’Enterria, A. Deshpande, E. J. Desmond, K. V. Dharmawardane, O. Dietzsch, A. Dion, M. Donadelli, L. D’Orazio, O. Drapier, A. Drees, K. A. Drees, A. K. Dubey, J. M. Durham, A. Durum, D. Dutta, V. Dzhordzhadze, S. Edwards, Y. V. Efremenko, F. Ellinghaus, T. Engelmore, A. Enokizono, H. En’yo, S. Esumi, K. O. Eyser, B. Fadem, D. E. Fields, M. Finger, F. Fleuret, S. L. Fokin, Z. Fraenkel, J. E. Frantz, A. Franz, A. D. Frawley, K. Fujiwara, Y. Fukao, T. Fusayasu, I. Garishvili, A. Glenn, H. Gong, M. Gonin, J. Gosset, Y. Goto, R. Granier de Cassagnac, N. Grau, S. V. Greene, G. Grim, M. Grosse Perdekamp, T. Gunji, H.-Å. Gustafsson, A. Hadj Henni, J. S. Haggerty, K. I. Hahn, H. Hamagaki, J. Hamblen, J. Hanks, R. Han, E. P. Hartouni, K. Haruna, E. Haslum, R. Hayano, M. Heffner, T. K. Hemmick, T. Hester, X. He, J. C. Hill, M. Hohlmann, W. Holzmann, K. Homma, B. Hong, T. Horaguchi, D. Hornback, S. Huang, T. Ichihara, R. Ichimiya, H. Iinuma, Y. Ikeda, K. Imai, J. Imrek, M. Inaba, D. Isenhower, M. Ishihara, T. Isobe, M. Issah, A. Isupov, D. Ivanischev, Y. Iwanaga, B. V. Jacak, J. Jia, X. Jiang, J. Jin, B. M. Johnson, T. Jones, K. S. Joo, D. Jouan, D. S. Jumper, F. Kajihara, S. Kametani, N. Kamihara, J. Kamin, J. H. Kang, J. Kapustinsky, K. Karatsu, M. Kasai, D. Kawall, M. Kawashima, A. V. Kazantsev, T. Kempel, A. Khanzadeev, K. M. Kijima, J. Kikuchi, A. Kim, B. I. Kim, D. H. Kim, D. J. Kim, E. J. Kim, E. Kim, S. H. Kim, Y.-J. Kim, E. Kinney, K. Kiriluk, Á. Kiss, E. Kistenev, J. Klay, C. Klein-Boesing, L. Kochenda, B. Komkov, M. Konno, J. Koster, A. Kozlov, A. Král, A. Kravitz, G. J. Kunde, K. Kurita, M. Kurosawa, M. J. Kweon, Y. Kwon, G. S. Kyle, R. Lacey, Y. S. Lai, J. G. Lajoie, D. Layton, A. Lebedev, D. M. Lee, J. Lee, K. B. Lee, K. S. Lee, T. Lee, M. J. Leitch, M. A. L. Leite, B. Lenzi, P. Lichtenwalner, P. Liebing, L. A. Linden Levy, T. Liška, A. Litvinenko, H. Liu, M. X. Liu, X. Li, B. Love, D. Lynch, C. F. Maguire, Y. I. Makdisi, A. Malakhov, M. D. Malik, V. I. Manko, E. Mannel, Y. Mao, L. Mašek, H. Masui, F. Matathias, M. McCumber, P. L. McGaughey, N. Means, B. Meredith, Y. Miake, T. Mibe, A. C. Mignerey, P. Mikeš, K. Miki, A. Milov, M. Mishra, J. T. Mitchell, A. K. Mohanty, H. J. Moon, Y. Morino, A. Morreale, D. P. Morrison, T. V. Moukhanova, D. Mukhopadhyay, T. Murakami, J. Murata, S. Nagamiya, J. L. Nagle, M. Naglis, M. I. Nagy, I. Nakagawa, Y. Nakamiya, K. R. Nakamura, T. Nakamura, K. Nakano, S. Nam, J. Newby, M. Nguyen, M. Nihashi, T. Niita, R. Nouicer, A. S. Nyanin, C. Oakley, E. O’Brien, S. X. Oda, C. A. Ogilvie, K. Okada, M. Oka, Y. Onuki, A. Oskarsson, M. Ouchida, K. Ozawa, R. Pak, A. P. T. Palounek, V. Pantuev, V. Papavassiliou, I. H. Park, J. Park, S. K. Park, W. J. Park, S. F. Pate, H. Pei, J.-C. Peng, H. Pereira, V. Peresedov, D. Yu. Peressounko, R. Petti, C. Pinkenburg, R. P. Pisani, M. Proissl, M. L. Purschke, A. K. Purwar, H. Qu, J. Rak, A. Rakotozafindrabe, I. Ravinovich, K. F. Read, S. Rembeczki, K. Reygers, V. Riabov, Y. Riabov, E. Richardson, D. Roach, G. Roche, S. D. Rolnick, M. Rosati, C. A. Rosen, S. S. E. Rosendahl, P. Rosnet, P. Rukoyatkin, P. Ružička, V. L. Rykov, B. Sahlmueller, N. Saito, T. Sakaguchi, S. Sakai, K. Sakashita, V. Samsonov, S. Sano, T. Sato, S. Sawada, K. Sedgwick, J. Seele, R. Seidl, A. Yu. Semenov, V. Semenov, R. Seto, D. Sharma, I. Shein, T.-A. Shibata, K. Shigaki, M. Shimomura, K. Shoji, P. Shukla, A. Sickles, C. L. Silva, D. Silvermyr, C. Silvestre, K. S. Sim, B. K. Singh, C. P. Singh, V. Singh, M. Slunečka, A. Soldatov, R. A. Soltz, W. E. Sondheim, S. P. Sorensen, I. V. Sourikova, F. Staley, P. W. Stankus, E. Stenlund, M. Stepanov, A. Ster, S. P. Stoll, T. Sugitate, C. Suire, A. Sukhanov, J. Sziklai, E. M. Takagui, A. Taketani, R. Tanabe, Y. Tanaka, S. Taneja, K. Tanida, M. J. Tannenbaum, S. Tarafdar, A. Taranenko, P. Tarján, H. Themann, D. Thomas, T. L. Thomas, M. Togawa, A. Toia, L. Tomášek, Y. Tomita, H. Torii, R. S. Towell, V-N. Tram, I. Tserruya, Y. Tsuchimoto, C. Vale, H. Valle, H. W. van Hecke, E. Vazquez-Zambrano, A. Veicht, J. Velkovska, R. Vértesi, A. A. Vinogradov, M. Virius, V. Vrba, E. Vznuzdaev, X. R. Wang, D. Watanabe, K. Watanabe, Y. Watanabe, F. Wei, J. Wessels, S. N. White, D. Winter, C. L. Woody, R. M. Wright, M. Wysocki, W. Xie, Y. L. Yamaguchi, K. Yamaura, R. Yang, A. Yanovich, J. Ying, S. Yokkaichi, G. R. Young, I. Younus, Z. You, I. E. Yushmanov, W. A. Zajc, O. Zaudtke, C. Zhang, S. Zhou, and L. Zolin

Subjects
Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, media_common.quotation_subject, Zero (complex analysis), Value (computer science), 01 natural sciences, Asymmetry, Nuclear physics, Transverse plane, Correlation function (statistical mechanics), 0103 physical sciences, High Energy Physics::Experiment, Production (computer science), Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider, media_common, Spin-½
Abstract

We previously reported [Phys. Rev. D 82, 112008 (2010)] measurements of transverse single-spin asymmetries, A_N, in J/psi production from transversely polarized p+p collisions at sqrt(s)=200 GeV with data taken by the PHENIX experiment at the Relativistic Heavy Ion Collider in 2006 and 2008. Subsequently, we have found errors in the analysis procedures for the 2008 data, which resulted in an erroneous value for the extracted A_N. The errors affected the sorting of events into the correct left/right and forward/backward bins. This produced an incorrect value for the 2008 result, but the 2006 result is unaffected. We have conducted two independent reanalyses with these errors corrected, and we present here the corrected values for the 2008 data and the combined results for 2006 and 2008. The new combined spin asymmetry in the forward region is A_N = -0.026+/-0.026(stat)+/-0.003(sys). Since this asymmetry is consistent with zero, we no longer claim that our results suggest a possible non-zero trigluon correlation function in transversely polarized protons.

Published
2012
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125. Cross sections and double-helicity asymmetries of midrapidity inclusive charged hadrons inp+pcollisions ats=62.4 GeV

Author

C. L. Woody, A. Berdnikov, L. Tomáek, I. V. Sourikova, M. Ouchida, N. Means, J. Asai, Shingo Sakai, T. L. Thomas, Ryugo S. Hayano, S. P. Sorensen, Y. Riabov, Kenta Shigaki, M. Nguyen, A. S. Nyanin, Rachid Nouicer, Seong H. Kim, J. G. Lajoie, M. I. Nagy, M. Issah, Tae-Yeon Lee, Martin Purschke, I. J. Choi, A. Kravitz, M. D. Malik, E. Vznuzdaev, A. Morreale, Z. Fraenkel, A. Hadj Henni, S. Afanasiev, A. Ster, R. K. Choudhury, Mate Csanad, Beomkyu Kim, K. Boyle, Wei Xie, Takao Sakaguchi, C. Klein-Boesing, H. A. Gustafsson, A. D. Frawley, J. Newby, Minghui Liu, M. Heffner, Jen-Chieh Peng, S. Huang, C. Zhang, Kenneth Francis Read, J. T. Mitchell, W. Holzmann, Maya Hachiya Shimomura, L. Maek, H. Qu, David D'Enterria, D. Hornback, K. S. Joo, K. A. Drees, Xiong Wang, N. N. Ajitanand, Dong Jo Kim, R. Seidl, Y. I. Makdisi, M. Gonin, Vladislav Manko, Y. Ikeda, M. Slunečka, Tadaaki Isobe, A. Veicht, A. Taranenko, J. G. Boissevain, E. J. Mannel, S. Belikov, Vladimir Samsonov, S. Esumi, V. S. Pantuev, Hideki Hamagaki, K. Aoki, G. David, I. Tserruya, Yu. Efremenko, Viktor Riabov, Takahiro Nakamura, J. Jin, D. Sharma, R. Ichimiya, E. M. Takagui, V. Singh, C. Baumann, A. Sukhanov, S. Kametani, Kazushi Miki, M. J. Tannenbaum, H. Torii, P. L. McGaughey, B. Azmoun, A. Král, M. J. Kweon, Brajesh K. Singh, Laurent Bernard Aphecetche, Johannes Peter Wessels, Susumu Oda, H. Pereira, C. P. Singh, Y. Morino, Y. Fukao, B. M. Johnson, D. Mukhopadhyay, S. Rembeczki, C. Vale, B. S. Chang, K. O. Eyser, O. Dietzsch, A. K. Purwar, K. Fujiwara, K. Das, Tamas Ferenc Csorgo, E. T. Atomssa, C. Pinkenburg, E. P. Hartouni, M. Chiu, Herve Borel, Christine Angela Aidala, J. Klay, D. Lynch, R. A. Soltz, J. L. Nagle, M. Oka, H. Valle, A. Dion, K. Okada, Dipanwita Dutta, A. Durum, A. Isupov, E. J. Desmond, B. Sahlmueller, T. Hester, M. Stepanov, G. Roche, H. En'yo, M. J. Leitch, A. Yu. Semenov, J. Sziklai, K. Yamaura, S. Sawada, Atsushi Taketani, M. Grosse Perdekamp, A. Enokizono, P. Liebing, Christophe Pierre Suire, Alexander Milov, I. Nakagawa, T. Engelmore, J. Ying, A. Franz, Brian Cole, Julia Velkovska, J. Gosset, C. Silvestre, F. Matathias, Kensuke Homma, R. S. Towell, M. Togawa, J. Park, Marisilvia Donadelli, V. Bumazhnov, O. Drapier, Frank Ellinghaus, E. R. Kinney, D. Kawall, Eva Haslum, B. Lenzi, I. Garishvili, F. Wei, P. Constantin, D. P. Morrison, H. Iinuma, S. Chernichenko, A. P.T. Palounek, Andry Malala Rakotozafindrabe, S. Campbell, K. B. Lee, H. Themann, P. Mike, V-N. Tram, N. Grau, B. Bassalleck, V. E. Semenov, V. L. Rykov, T. Dahms, R. Tanabe, D. Layton, Y. Tsuchimoto, Tatsuya Chujo, H. W. Van Hecke, M. Konno, C. Y. Chi, C. A. Ogilvie, J. Murata, Motoi Inaba, S. Yokkaichi, S. Bathe, T. K. Hemmick, David Olle Rickard Silvermyr, M. Wysocki, G. S. Kyle, W. C. Chang, I. E. Yushmanov, A. V. Kazantsev, Gerd Joachim Kunde, Y. J. Mao, Agneta Oskarsson, T. Horaguchi, Yasuo Miake, James Alexander, C. M. Camacho, I. Shein, D. Roach, K. M. Kijima, Rushan Han, Y. Berdnikov, T. Kempel, Y. Akiba, Prashant Shukla, R. Averbeck, Byung-Sik Hong, A. Bazilevsky, J. H. Kang, S. F. Pate, J. S. Haggerty, L. Kochenda, K. Sedgwick, D. Winter, M. Rosati, M. Mishra, S. Nagamiya, Philippe Rosnet, D. Yu Peressounko, H. Al-Bataineh, Dong-Hun Kim, Alberto Baldisseri, A. Deshpande, Alexandre Lebedev, R. Pak, Vaclav Vrba, Klaus Johannes Reygers, D. E. Fields, D. M. Lee, Xingguo Li, N. Kamihara, P. Tarján, B. V. Jacak, A. A. Vinogradov, T. C. Awes, Kyoichiro Ozawa, K. Kiriluk, Y. Watanabe, Y. L. Yamaguchi, V. Papavassiliou, Jiangyong Jia, Y. Goto, B. Komkov, Kazuyoshi Kurita, Jun Kikuchi, Y. S. Lai, I. Younus, A. Drees, Y. Nakamiya, M. McCumber, Norio Saito, A. Soldatov, K. Sakashita, Alexei Khanzadeev, G. Baksay, M. A. L. Leite, E. Stenlund, Jason Kamin, S. P. Stoll, A. Kiss, H. Liu, S. S.E. Rosendahl, G. Bunce, Henner Buesching, Senta Greene, J. S. Kapustinsky, M. Naglis, T. V. Moukhanova, C. L. Silva, K. Shoji, A. Churyn, R. Vértesi, Marcus Hohlmann, Masayasu Ishihara, D. Jouan, A. T. Basye, I. Ravinovich, V. Babintsev, E. H. Kim, J. E. Frantz, M. Bai, P. W. Stankus, B. Fadem, E. O'Brien, W. A. Zajc, R. Bennett, V. Baublis, M. Finger, S. Dairaku, O. Zaudtke, A. Denisov, V. Cianciolo, M. Virius, Y. Tomita, A. Glenn, Sergey Fokin, K. N. Barish, M. L. Brooks, X. He, V. Peresedov, J. L. Charvet, J. Koster, M. Kurosawa, P. Chung, T. Lika, J. Imrek, S. Batsouli, A. Datta, H. Masui, A. K. Dubey, A. A. Bickley, K. S. Sim, V. Dzhordzhadze, Y. Kwon, R. Yang, S. Taneja, K. Imai, Ajit Kumar Mohanty, Anne Marie Sickles, T. A. Shibata, T. Sato, B. Love, D. Isenhower, A. Toia, G. R. Young, A. G. Litvinenko, T. Niita, Y. Onuki, Jan Rak, R. Lacey, R. Granier de Cassagnac, A. Adare, A. Kozlov, R. Seto, K. Haruna, Taku Gunji, H. Gong, J. Seele, F. Kajihara, S. Butsyk, S. Zhou, S. D. Rolnick, H. Pei, Y. Tanaka, F. Staley, L. Baksay, Charles Maguire, Kiyoshi Tanida, E. Kistenev, S. N. White, Zvi Hirsh Citron, K. Nakano, W. E. Sondheim, D. Ivanischev, P. A. Rukoyatkin, B. Meredith, John Hill, P. Ruička, Toru Sugitate, François Fleuret, T. Ichihara, Takahiro Fusayasu, Alexander Malakhov, L. S. Zolin, W. J. Park, P. D. Barnes, and A. Yanovich

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, media_common.quotation_subject, High Energy Physics::Phenomenology, Hadron, Perturbative QCD, Polarization (waves), Deep inelastic scattering, 01 natural sciences, Helicity, Asymmetry, Gluon, Nuclear physics, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider, media_common
Abstract

Unpolarized cross sections and double-helicity asymmetries of single-inclusive positive and negative charged hadrons at midrapidity from p + p collisions at root s = 62.4 GeV are presented. The PHENIX measurement of the cross sections for 1.0 < p(T) < 4.5 GeV/c are consistent with perturbative QCD calculations at next-to-leading order in the strong-coupling constant, alpha(s). Resummed pQCD calculations including terms with next-to-leading-log accuracy, yielding reduced theoretical uncertainties, also agree with the data. The double-helicity asymmetry, sensitive at leading order to the gluon polarization in a momentum-fraction range of 0.05 less than or similar to x(gluon) less than or similar to 0.2, is consistent with recent global parametrizations disfavoring large gluon polarization.

Published
2012
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126. Direct photon production inp+pcollisions ats=200 GeVat midrapidity

Author

K. B. Lee, Takao Sakaguchi, C. Klein-Boesing, R. Vértesi, A. D. Frawley, Jen-Chieh Peng, S. Huang, J. T. Mitchell, A. Kiss, Xiong Wang, W. Holzmann, Henner Buesching, D. Roach, K. M. Kijima, Dong Jo Kim, G. S. Kyle, J. E. Frantz, R. Seidl, Vladislav Manko, D. E. Fields, Marcus Hohlmann, C. Silvestre, James Alexander, B. V. Jacak, M. Slunečka, M. McCumber, A. Veicht, Marisilvia Donadelli, V. Bumazhnov, Andry Malala Rakotozafindrabe, P. Mikeš, S. Belikov, R. Averbeck, Byung-Sik Hong, S. Bathe, R. Tanabe, D. Layton, A. Deshpande, A. Bazilevsky, Xingguo Li, Agneta Oskarsson, Y. Berdnikov, Y. Akiba, Christophe Pierre Suire, Alexander Milov, I. Nakagawa, T. Engelmore, M. Mishra, S. Nagamiya, W. C. Chang, J. L. Charvet, Philippe Rosnet, Vaclav Vrba, Klaus Johannes Reygers, Mate Csanad, O. Drapier, Frank Ellinghaus, E. R. Kinney, Alexandre Lebedev, M. Kurosawa, Rushan Han, D. P. Morrison, S. Campbell, P. Chung, C. Vale, B. S. Chang, Christine Angela Aidala, J. Klay, V. E. Semenov, J. Imrek, D. M. Lee, T. L. Thomas, Tatsuya Chujo, I. Tserruya, Yu. Efremenko, V. Singh, Y. Watanabe, K. O. Eyser, A. K. Purwar, K. Fujiwara, Anne Marie Sickles, K. Kiriluk, Ajit Kumar Mohanty, T. A. Shibata, T. Sato, David D'Enterria, E. H. Kim, A. Hadj Henni, E. J. Desmond, K. N. Barish, Beomkyu Kim, K. Boyle, Wei Xie, A. V. Kazantsev, Maya Hachiya Shimomura, S. P. Sorensen, F. Matathias, I. Younus, M. Togawa, J. Park, C. A. Ogilvie, Charles Maguire, Y. I. Makdisi, S. Dairaku, T. K. Hemmick, Ryugo S. Hayano, Y. Riabov, Yasuo Miake, D. Isenhower, A. Toia, L. Mašek, T. Niita, Kensuke Homma, Kenta Shigaki, M. Nguyen, P. Constantin, S. Chernichenko, M. J. Tannenbaum, H. Qu, Y. Tsuchimoto, K. A. Drees, H. Torii, N. N. Ajitanand, L. Kochenda, Takahiro Nakamura, Y. Fukao, L. Tomášek, H. W. Van Hecke, A. Soldatov, I. E. Yushmanov, A. S. Nyanin, Eva Haslum, B. Lenzi, D. Mukhopadhyay, S. Rembeczki, T. Hester, B. Bassalleck, M. Konno, Susumu Oda, Rachid Nouicer, Hideki Hamagaki, K. Aoki, O. Zaudtke, S. Afanasiev, A. Ster, Vladimir Samsonov, Alexei Khanzadeev, Kiyoshi Tanida, G. R. Young, J. Newby, A. Durum, Y. L. Yamaguchi, Taku Gunji, H. Gong, J. Seele, G. David, Seong H. Kim, M. Naglis, C. L. Silva, F. Kajihara, B. Komkov, J. G. Lajoie, K. Yamaura, M. L. Brooks, E. Stenlund, Y. Nakamiya, R. Pak, N. Kamihara, Y. J. Mao, T. Horaguchi, Masayasu Ishihara, S. Butsyk, W. A. Zajc, V-N. Tram, E. Kistenev, D. Hornback, G. Baksay, Norio Saito, M. A. L. Leite, T. C. Awes, Kyoichiro Ozawa, T. Liška, N. Grau, Jun Kikuchi, D. Kawall, H. Themann, M. Virius, S. Zhou, K. Das, A. Taranenko, V. S. Pantuev, Motoi Inaba, B. Sahlmueller, J. Murata, A. Drees, I. J. Choi, A. Kravitz, Kazushi Miki, V. Baublis, A. Denisov, Brajesh K. Singh, E. P. Hartouni, Gerd Joachim Kunde, V. Cianciolo, I. Shein, Y. Tomita, B. Love, S. D. Rolnick, K. Sakashita, K. Sedgwick, H. Liu, J. S. Kapustinsky, M. Ouchida, K. S. Sim, V. Babintsev, K. Shoji, Alberto Baldisseri, Minghui Liu, N. Means, J. Asai, J. H. Kang, V. Dzhordzhadze, Sergey Fokin, Jason Kamin, J. S. Haggerty, P. W. Stankus, M. Heffner, S. P. Stoll, Kenneth Francis Read, A. G. Litvinenko, K. Okada, M. Gonin, S. S.E. Rosendahl, G. Bunce, Shingo Sakai, Y. Kwon, Tadaaki Isobe, A. Churyn, J. Jin, E. M. Takagui, J. L. Nagle, H. En'yo, D. Jouan, A. Glenn, I. Ravinovich, C. L. Woody, A. Berdnikov, M. J. Leitch, A. Kozlov, R. Seto, P. L. McGaughey, K. Haruna, C. Baumann, S. Kametani, R. Yang, T. Kempel, Dong-Hun Kim, M. Chiu, I. V. Sourikova, C. P. Singh, A. Sukhanov, K. Kurita, H. Pereira, M. Bai, X. He, B. M. Johnson, V. Peresedov, K. Imai, J. Koster, Y. Morino, A. Isupov, S. Batsouli, H. Masui, A. K. Dubey, A. A. Bickley, J. Sziklai, Y. Onuki, Brian Cole, H. Iinuma, Y. S. Lai, Y. Ikeda, J. G. Boissevain, Jan Rak, R. S. Towell, R. Bennett, A. P.T. Palounek, Y. Tanaka, M. Finger, I. Garishvili, F. Wei, C. Pinkenburg, R. Lacey, M. Stepanov, G. Roche, R. Granier de Cassagnac, A. Adare, E. Mannel, A. Yu. Semenov, H. A. Gustafsson, J. Gosset, C. Y. Chi, C. Zhang, S. Yokkaichi, P. Ružička, Herve Borel, D. Lynch, Viktor Riabov, A. Taketani, F. Staley, L. Baksay, V. L. Rykov, T. Dahms, H. Pei, K. S. Joo, O. Dietzsch, E. T. Atomssa, H. Valle, Dipanwita Dutta, Julia Velkovska, M. Rosati, A. A. Vinogradov, Jiangyong Jia, Y. Goto, S. Esumi, D. Sharma, R. Ichimiya, Tae-Yeon Lee, Martin Purschke, A. Morreale, Z. Fraenkel, R. A. Soltz, R. K. Choudhury, M. Grosse Perdekamp, B. Azmoun, A. Král, S. N. White, M. J. Kweon, D. Winter, D. Yu Peressounko, P. Tarján, T. Csörgő, Zvi Hirsh Citron, Senta Greene, A. T. Basye, K. Nakano, M. Oka, B. Fadem, E. O'Brien, M. Wysocki, W. E. Sondheim, C. M. Camacho, A. Dion, Prashant Shukla, D. Ivanischev, S. F. Pate, P. A. Rukoyatkin, T. Ichihara, H. Al-Bataineh, A. Enokizono, P. Liebing, Takahiro Fusayasu, Alexander Malakhov, V. Papavassiliou, D. Silvermyr, L. S. Zolin, W. J. Park, P. D. Barnes, A. Yanovich, T. V. Moukhanova, S. Sawada, J. Ying, A. Franz, B. Meredith, John Hill, Toru Sugitate, François Fleuret, M. I. Nagy, M. Issah, M. D. Malik, E. Vznuzdaev, L. Aphecetche, and Johannes Peter Wessels

Subjects
Physics, Scattering cross-section, Nuclear and High Energy Physics, Range (particle radiation), Particle physics, Photon, 010308 nuclear & particles physics, 01 natural sciences, Nuclear physics, Cross section (physics), 0103 physical sciences, Transverse momentum, Angular dependence, PHENIX detector, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider
Abstract

The differential cross section for the production of direct photons in p + p collisions at root s = 200 GeV at midrapidity was measured in the PHENIX detector at the Relativistic Heavy Ion Collider. Inclusive direct photons were measured in the transverse momentum range from 5: 5-25 GeV/c, extending the range beyond previous measurements. Event structure was studied with an isolation criterion. Next-to-leading-order perturbative-quantum-chromodynamics calculations give a good description of the spectrum. When the cross section is expressed versus x(T), the PHENIX data are seen to be in agreement with measurements from other experiments at different center-of-mass energies.

Published
2012
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127. Evolution ofπ0Suppression inAu+AuCollisions fromsNN=39to 200 GeV

Author

Atsushi Takahara, D. Kotov, Jason Kamin, S. P. Stoll, M. Stepanov, D. Jouan, L. Tomášek, Charles Maguire, K. A. Drees, S. Choi, X. He, Alexander Milov, S. Tarafdar, M. Rosati, T. Murakami, Kiyoshi Tanida, I. Ravinovich, L. Patel, I. Nakagawa, Young-Ki Kim, T. Engelmore, N. Novitzky, E. Kistenev, T. Ichihara, K. B. Lee, Alice Mignerey, J. Klatsky, Eva Haslum, L. D'Orazio, S. Miyasaka, Ryugo S. Hayano, Y. Riabov, T. C. Awes, Kyoichiro Ozawa, M. S. Daugherity, H. A. Gustafsson, T. Csörgő, O. Drapier, Takahiro Fusayasu, E. R. Kinney, C. P. Singh, Alexander Malakhov, Y. Miyachi, D. P. Morrison, Y. Aramaki, V. Peresedov, M. Bai, S. Campbell, Marisilvia Donadelli, V. Bumazhnov, Martin Purschke, B. H. Kang, J. Sun, Takao Sakaguchi, A. Sen, Kenta Shigaki, D. E. Fields, B. M. Johnson, Filip Krizek, E. C. Aschenauer, R. J. Petti, Robert Vertesi, B. V. Jacak, Y. Ikeda, Jiangyong Jia, Y. Goto, D. Silvermyr, A. Isupov, E. J. Mannel, H. Al-Ta'Ani, Tatsuya Chujo, L. S. Zolin, A. D. Frawley, A. S. Nyanin, S. Afanasiev, L. Ding, Rachid Nouicer, A. N. Zelenski, M. Proissl, A. Ster, S. Sawada, J. Ying, A. Franz, Y. Fukao, Y. Tanaka, G. Roche, J. Sziklai, V. S. Pantuev, M. Sano, Zhiying You, M. Gonin, M. Javani, S. Huang, D. Kleinjan, R. Reynolds, Brian Cole, M. McCumber, A. Dion, R. Akimoto, Senta Greene, M. I. Nagy, S. Masumoto, J. Koster, P. L. McGaughey, Jen-Chieh Peng, J. E. Frantz, A. Yanovich, M. Finger, S. Dairaku, Viktor Riabov, D. Roach, K. M. Kijima, Inkyu Park, D. Kawall, R. K. Choudhury, K. S. Joo, B. Fadem, C. Pinkenburg, E. O'Brien, M. Virius, E. T. Atomssa, C. L. Woody, A. Berdnikov, K. V. Dharmawardane, Xiong Wang, Dong Jo Kim, A. Taranenko, H. J. Moon, H. Pei, Maya Hachiya Shimomura, R. S. Hollis, Y. I. Makdisi, H. Themann, S. Baumgart, J. Murata, Gerd Joachim Kunde, Y. Nakamiya, Y. Tsuchimoto, M. Soumya, T. Horaguchi, Brajesh K. Singh, I. Shein, Tomoya Tsuji, M. Mendoza, O. Dietzsch, S. H. Lee, S. N. White, N. Apadula, H. J. Kim, C. H. Chen, H. Iinuma, T. Hester, E. M. Takagui, R. S. Towell, I. Tserruya, Yu. Efremenko, A. Vossen, A. Veicht, V. Singh, M. J. Tannenbaum, H. Torii, K. Hashimoto, C. Gal, J. Hanks, Sung Keun Park, N. N. Ajitanand, Takahiro Nakamura, I. Garishvili, F. Wei, A. Manion, Bum-Hoon Lee, M. Wysocki, B. Bannier, M. J. Leitch, Julia Velkovska, Zvi Hirsh Citron, K. Nakano, Minghui Liu, K. Sedgwick, A. Garishvili, D. McGlinchey, S. Esumi, Vladimir Samsonov, Christine Nattrass, S. Bathe, M. Chiu, Beomkyu Kim, T. Todoroki, D. Sharma, C. A. Ogilvie, Kisung Lee, T. K. Hemmick, J. M. Durham, E. Tennant, Yasuo Miake, Aaron Angerami, K. N. Barish, A. Durum, Y. Komatsu, Jongmin Lee, Kenneth Francis Read, Mihael Makek, A. Deshpande, K. B. Kim, F. Fleuret, Prashant Shukla, W. E. Sondheim, M. Issah, D. Ivanischev, S. F. Pate, I. V. Sourikova, A. Glenn, Eunja Kim, A. Sukhanov, S. Wolin, R. Pak, B. Azmoun, A. Král, H. Pereira, N. Grau, S. Yokkaichi, K. Okada, Ke. Nakamura, C. Y. Chi, W. A. Zajc, Byoungchoo Park, Kazuyoshi Kurita, M. Kasai, Y. J. Kwon, A. Drees, V. Baublis, Y. Watanabe, P. A. Rukoyatkin, A. Denisov, B. Meredith, Tomofumi Nagae, J. L. Nagle, V. Cianciolo, P. Kline, P. Castera, M. Leitgab, C. O. Kim, Atsushi Taketani, M. Ouchida, I. Younus, Sergey Fokin, Motoi Inaba, I. J. Choi, H. Qu, J. S. Kang, S. Motschwiller, M. Vargyas, M. L. Brooks, John Hill, J. H. Kang, J. S. Haggerty, S. R. Lee, M. Sarsour, Mate Csanad, S. P. Sorensen, V. Papavassiliou, A. Iordanova, Toru Sugitate, B. Lewis, B. Love, X. Bing, O. Chvala, B. Sahlmueller, Y. J. Kim, M. Nihashi, J. G. Lajoie, A. G. Litvinenko, T. Hachiya, Y. S. Lai, D. Watanabe, E. Vznuzdaev, R. P. Pisani, R. Seto, Kensuke Homma, Dmitry Blau, E. Richardson, E. J. Desmond, K. I. Hahn, E. Vazquez-Zambrano, A. Nederlof, B. Bassalleck, I. E. Yushmanov, L. Guo, K. Boyle, J. T. Mitchell, Alexei Khanzadeev, E. Stenlund, J. B. Choi, R. Seidl, Vladislav Manko, M. Slunečka, Dipak Kumar Mishra, C. Vale, Christine Angela Aidala, T. V. Moukhanova, R. A. Soltz, M. Grosse Perdekamp, Taku Gunji, M. E. Connors, Peter Christiansen, D. Winter, D. Yu Peressounko, S. D. Rolnick, Ajit Kumar Mohanty, T. A. Shibata, C. L. Silva, Agneta Oskarsson, Y. Berdnikov, Y. Akiba, C. McKinney, S. Nagamiya, Vaclav Vrba, Rui Wei, D. Isenhower, K. O. Eyser, Y. L. Yamaguchi, M. Kurosawa, A. Enokizono, J. Imrek, H. W. Van Hecke, A. Datta, H. Asano, A. Kiss, Jan Rak, Henner Buesching, R. Lacey, S. Butsyk, X. Gong, R. Granier de Cassagnac, A. Adare, L. A. Linden Levy, M. Tomášek, G. S. Kyle, James Alexander, K. Karatsu, Byung-Sik Hong, A. Bazilevsky, Alexandre Lebedev, Y. Hori, Anne Marie Sickles, D. M. Lee, K. Gainey, X. Jiang, D. Kotchetkov, B. Komkov, Norio Saito, Tsutomu Mibe, M. A. L. Leite, S. H. Lim, R. Belmont, J. S. Kapustinsky, V. Babintsev, S. Edwards, K. S. Sim, R. Yang, S. Taneja, Hideki Hamagaki, K. Aoki, G. David, K. Watanabe, Yosuke Watanabe, K. Shoji, P. W. Stankus, T. Kempel, S. Kaneti, and A. V. Kazantsev

Subjects
Physics, Nuclear physics, Range (particle radiation), Pi, Exponent, General Physics and Astronomy, Parton, Impact parameter, Atomic physics, Nuclear Experiment, Relativistic Heavy Ion Collider, Power law, Spectral line
Abstract

Neutral-pion pi(0) spectra were measured at midrapidity (vertical bar y vertical bar < 0.35) in Au + Au collisions at root s(NN) = 39 and 62.4 GeV and compared with earlier measurements at 200 GeV in a transverse-momentum range of 1 < p(T) < 10 GeV/c. The high-p(T) tail is well described by a power law in all cases, and the powers decrease significantly with decreasing center-of-mass energy. The change of powers is very similar to that observed in the corresponding spectra for p + p collisions. The nuclear modification factors (RAA) show significant suppression, with a distinct energy, centrality, and p(T) dependence. Above p(T) = 7 GeV/c, R-AA is similar for root sNN = 62.4 and 200 GeV at all centralities. Perturbative-quantum-chromodynamics calculations that describe R-AA well at 200 GeV fail to describe the 39 GeV data, raising the possibility that, for the same p(T) region, the relative importance of initial-state effects and soft processes increases at lower energies. The p(T) range where pi(0) spectra in central Au + Au collisions have the same power as in p + p collisions is approximate to 5 and 7 GeV/c for root sNN = 200 and 62.4 GeV, respectively. For the root sNN = 39 GeV data, it is not clear whether such a region is reached, and the x(T) dependence of the x(T)-scaling power-law exponent is very different from that observed in the root sNN = 62 and 200 GeV data, providing further evidence that initial-state effects and soft processes mask the in-medium suppression of hardscattered partons to higher p(T) as the collision energy decreases.

Published
2012
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128. Nuclear-modification factor for open-heavy-flavor production at forward rapidity in Cu+Cu collisions atsNN=200GeV

Author

Tadaaki Isobe, T. E. Miller, P. L. McGaughey, I. Tserruya, P. Chung, W. S. Emam, M. Chiu, S. F. Pate, Yu. Efremenko, H. Al-Bataineh, V. Singh, V. Papavassiliou, Sébastien Gadrat, T. A. Shibata, S. Takagi, K. N. Barish, M. L. Brooks, A. V. Kazantsev, Mate Csanad, L. Tomášek, P. Mikeš, Robert F. Hobbs, D. Isenhower, A. Toia, L. Mašek, B. Love, Alexander Milov, A. G. Litvinenko, T. C. Awes, Kyoichiro Ozawa, T. Liška, D. E. Fields, I. Nakagawa, B. V. Jacak, Jun Kikuchi, O. Drapier, Frank Ellinghaus, A. Kozlov, E. R. Kinney, R. Seto, H. Kanou, Taku Gunji, H. Gong, R. Vértesi, G. S. Kyle, Debashish Pal, D. P. Morrison, K. Haruna, M. McCumber, J. Seele, S. Sawada, S. Campbell, F. Kajihara, V. E. Semenov, J. Ying, A. Franz, Minghui Liu, J. Zimányi, X. He, O. O. Omiwade, M. Heffner, Tatsuya Chujo, K. Dehmelt, H. Delagrange, Kenneth Francis Read, V. Peresedov, Jen-Chieh Peng, S. Zhou, N. N. Ajitanand, S. Batsouli, H. Masui, A. K. Dubey, A. A. Bickley, Xiong Wang, Dong Jo Kim, M. Mitrovski, James Alexander, Takahiro Nakamura, Susumu Oda, J. Egdemir, C. Silvestre, Hiroaki Ohnishi, M. B. Deaton, M. Wysocki, A. Durum, Steven E. Skutnik, Jason Kamin, S. P. Stoll, R. Averbeck, Byung-Sik Hong, David D'Enterria, S. S.E. Rosendahl, G. Bunce, A. Bazilevsky, Marisilvia Donadelli, Y. Tanaka, M. Ouchida, Philippe Rosnet, A. Churyn, V. Bumazhnov, M. P. Comets, J. Chiba, D. Jouan, Jan Rak, R. Lacey, R. Pak, N. Kamihara, K. S. Joo, V. S. Pantuev, R. Armendariz, Alexandre Lebedev, H. Qu, Andry Malala Rakotozafindrabe, A. Drees, J. Asai, R. Granier de Cassagnac, A. Adare, D. M. Lee, H. Iinuma, R. A. Soltz, J. T. Mitchell, J. Kubart, O. Dietzsch, F. Staley, L. Baksay, Hideki Hamagaki, K. Aoki, G. David, E. T. Atomssa, Shingo Sakai, H. Valle, J. E. Frantz, C. A. Ogilvie, R. Seidl, T. K. Hemmick, Yasuo Miake, Y. L. Yamaguchi, Vladislav Manko, B. Komkov, A. P.T. Palounek, L. Kochenda, H. Pei, M. Issah, M. N. Wagner, C. L. Woody, Takao Sakaguchi, Junji Tojo, M. Slunečka, Norio Saito, C. Klein-Boesing, M. D. Malik, E. Vznuzdaev, M. A. L. Leite, Eva Haslum, B. Lenzi, Julia Velkovska, Rushan Han, S. Esumi, N. Grau, D. Sharma, S. Belikov, S. Butsyk, K. Shoji, K. S. Sim, V. Dzhordzhadze, A. D. Frawley, Vladimir Samsonov, P. W. Stankus, E. J. Desmond, K. Okada, Y. Kwon, S. Afanasiev, A. Ster, T. Tabaru, A. Garishvili, V. Babintsev, Xingguo Li, M. Togawa, I. V. Sourikova, H. Hiejima, S. H. Aronson, Tae-Yeon Lee, T. L. Thomas, Tamas Ferenc Csorgo, W. A. Zajc, Martin Purschke, M. Grosse Perdekamp, B. Sahlmueller, H. En'yo, J. Park, L. Aphecetche, V. Baublis, A. Denisov, M. J. Leitch, V. Cianciolo, S. P. Sorensen, Dylan Walker, Y. Fukao, E. H. Kim, J. L. Nagle, J. Newby, C. Vale, Charles Maguire, Y. Tsuchimoto, Ryugo S. Hayano, W. Holzmann, Maya Hachiya Shimomura, K. Imai, Sergey Fokin, B. S. Chang, Y. Riabov, T. Horaguchi, Y. I. Makdisi, Christine Angela Aidala, Kiyoshi Tanida, Kenta Shigaki, M. Rosati, I. E. Yushmanov, D. Kotchetkov, J. Klay, M. Nguyen, E. Kistenev, Anne Marie Sickles, C. R. Cleven, Johannes Peter Wessels, Alexei Khanzadeev, J. G. Lajoie, A. Morreale, T. Hachiya, A. S. Nyanin, Rachid Nouicer, A. Hadj Henni, E. Stenlund, D. Hornback, Z. Fraenkel, H. A. Gustafsson, H. Sakata, K. Das, F. Matathias, C. Haegemann, Y. Inoue, H. Harada, K. Boyle, Wei Xie, M. K. Lee, M. J. Tannenbaum, C. Zhang, A. A. Vinogradov, Kensuke Homma, M. Naglis, Dong-Hun Kim, C. L. Silva, I. J. Choi, A. Kravitz, G. R. Young, A. Taranenko, E. P. Hartouni, M. Gonin, Kazushi Miki, Jiangyong Jia, D. Mukhopadhyay, P. Constantin, Y. Goto, S. Chernichenko, B. Azmoun, Viktor Riabov, A. Král, S. Rembeczki, B. Bassalleck, M. J. Kweon, K. O. Eyser, A. K. Purwar, M. Konno, T. V. Moukhanova, K. Fujiwara, Masayasu Ishihara, K. Kurita, H. Pereira, D. Winter, Y. Nakamiya, M. Oka, Susumu Sato, G. Baksay, D. Yu Peressounko, P. Tarján, A. Dion, A. Deshpande, A. Enokizono, Herve Borel, D. Lynch, Y. Watanabe, I. Younus, A. Taketani, H. W. Van Hecke, A. Soldatov, Senta Greene, D. Kawall, V. I. Kochetkov, B. E. Norman, E. O'Brien, J. Murata, A. Kiss, V. L. Rykov, T. Dahms, Gerd Joachim Kunde, I. Shein, Z. Yasin, Henner Buesching, Alberto Baldisseri, Marcus Hohlmann, S. Bathe, Agneta Oskarsson, Y. Berdnikov, Y. Akiba, M. Mishra, S. Nagamiya, Vaclav Vrba, Klaus Johannes Reygers, O. Zaudtke, M. Virius, S. N. White, K. Nakano, W. E. Sondheim, P. A. Rukoyatkin, John Hill, Saskia Mioduszewski, H. A. Torii, Toru Sugitate, L. D. Isenhower, A. Glenn, I. Ravinovich, François Fleuret, T. Ichihara, Osamu Jinnouchi, Matthew G. Reuter, Takahiro Fusayasu, Y. Nagata, A. Shevel, T. Hester, Alexander Malakhov, V-N. Tram, D. Silvermyr, L. S. Zolin, W. J. Park, Motoi Inaba, P. D. Barnes, A. Yanovich, R. Bennett, M. Finger, J. G. Boissevain, Masashi Kaneta, C. Pinkenburg, M. Stepanov, G. Roche, J. Gosset, S. Yokkaichi, Y. J. Mao, S. Kametani, J. H. Kang, J. S. Haggerty, A. Romana, Y. S. Lai, J. Jin, E. M. Takagui, C. P. Singh, B. M. Johnson, A. Isupov, C. Suire, J. Sziklai, Brian Cole, R. S. Towell, I. Garishvili, Akio Kiyomichi, N. Kurihara, C. Y. Chi, and J. L. Charvet

Subjects
Semileptonic decay, Physics, Nuclear and High Energy Physics, Particle physics, Muon, Meson, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Hadron, 01 natural sciences, Upper and lower bounds, Spectral line, Nuclear physics, 0103 physical sciences, High Energy Physics::Experiment, Rapidity, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider
Abstract

Background: Heavy-flavor production in p + p collisions is a good test of perturbative-quantum-chromodynamics (pQCD) calculations. Modification of heavy-flavor production in heavy-ion collisions relative to binary-collision scaling from p + p results, quantified with the nuclear-modification factor (R-AA), provides information on both cold-and hot-nuclear-matter effects. Midrapidity heavy-flavor R-AA measurements at the Relativistic Heavy Ion Collider have challenged parton-energy-loss models and resulted in upper limits on the viscosity-entropy ratio that are near the quantum lower bound. Such measurements have not been made in the forward-rapidity region. Purpose: Determine transverse-momentum (p(T)) spectra and the corresponding R-AA for muons from heavy-flavor meson decay in p + p and Cu + Cu collisions at root s(NN) = 200 GeV and y = 1.65. Method: Results are obtained using the semileptonic decay of heavy-flavor mesons into negative muons. The PHENIX muon-arm spectrometers measure the p(T) spectra of inclusive muon candidates. Backgrounds, primarily due to light hadrons, are determined with a Monte Carlo calculation using a set of input hadron distributions tuned to match measured-hadron distributions in the same detector and statistically subtracted. Results: The charm-production cross section in p + p collisions at root s = 200 GeV, integrated over p(T) and in the rapidity range 1.4 < y < 1.9, is found to be d(sigma e (e) over bar)/dy = 0.139 +/- 0.029 (stat)(-0.058)(+0.051) (syst) mb. This result is consistent with a perturbative fixed-order-plus-next-to-leading-log calculation within scale uncertainties and is also consistent with expectations based on the corresponding midrapidity charm-production cross section measured by PHENIX. The R-AA for heavy-flavor muons in Cu + Cu collisions is measured in three centrality bins for 1 < p(T) < 4 GeV/c. Suppression relative to binary-collision scaling (R-AA < 1) increases with centrality. Conclusions: Within experimental and theoretical uncertainties, the measured charm yield in p + p collisions is consistent with state-of-the-art pQCD calculations. Suppression in central Cu + Cu collisions suggests the presence of significant cold-nuclear-matter effects and final-state energy loss.

Published
2012
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129. Deviation from quark number scaling of the anisotropy parameterv2of pions, kaons, and protons inAu+Aucollisions atsNN=200GeV

Author

J. P. Wood, Alexander Milov, I. Nakagawa, R. Luechtenborg, T. Engelmore, Beomkyu Kim, Wei Xie, O. Drapier, Frank Ellinghaus, E. R. Kinney, Jongmin Lee, D. P. Morrison, S. Campbell, Tatsuya Chujo, K. N. Barish, A. Taketani, D. S. Jumper, H. Pei, T. Dahms, H. A. Gustafsson, M. I. Nagy, P. Tarján, D. Watanabe, M. D. Malik, E. Vznuzdaev, S. Dairaku, S. N. White, C. Zhang, Jen-Chieh Peng, P. Ružička, A. Deshpande, S. Sano, Inkyu Park, Xiong Wang, Dong Jo Kim, M. Ouchida, Sung Keun Park, M. Virius, Viktor Riabov, N. Means, K. B. Lee, N. N. Ajitanand, S. V. Afanasiev, Charles Maguire, C. Silvestre, M. L. Brooks, X. He, C. H. Chen, A. Veicht, Maya Hachiya Shimomura, Johannes Peter Wessels, O. Dietzsch, Y. Aramaki, E. T. Atomssa, B. Azmoun, Y. J. Mao, A. Král, Takahiro Nakamura, Senta Greene, A. Glenn, I. Ravinovich, V. Peresedov, H. Valle, A. T. Basye, E. Kistenev, J. Koster, I. Tserruya, J. H. Kang, M. Wysocki, J. S. Haggerty, Masamichi Ishihara, Y. Watanabe, Susumu Oda, M. Bai, Dipanwita Dutta, D. Roach, W. A. Zajc, Alexei Khanzadeev, Yu. Efremenko, V. Singh, K. A. Drees, I. Younus, Y. J. Kwon, K. M. Kijima, C. L. Woody, H. Masui, A. A. Bickley, V. Baublis, A. Denisov, V. Cianciolo, A. Berdnikov, S. Tarafdar, Julia Velkovska, M. Rosati, Sergey Fokin, E. Stenlund, A. Durum, Y. I. Makdisi, Zhiying You, R. Bennett, Xingguo Li, B. Komkov, Eva Haslum, B. Lenzi, M. Kawashima, B. Fadem, E. O'Brien, M. Kurosawa, C. M. Camacho, Prashant Shukla, S. F. Pate, D. Kawall, B. Love, K. Yamaura, H. Themann, Minghui Liu, R. A. Soltz, M. Grosse Perdekamp, M. E. Connors, A. A. Vinogradov, Y. Tanaka, Norio Saito, E. Mannel, M. Finger, S. P. Sorensen, M. A. L. Leite, H. Al-Bataineh, Y. S. Lai, I. V. Sourikova, M. Heffner, Kenneth Francis Read, T. Ichihara, Jiangyong Jia, Y. Goto, O. Chvala, M. Oka, Hongfang Liu, M. J. Tannenbaum, T. L. Thomas, Seong H. Kim, Y. Ikeda, A. G. Litvinenko, D. E. Fields, J. Newby, B. V. Jacak, Eunja Kim, D. Kotchetkov, K. S. Lee, A. Dion, A. V. Kazantsev, J. G. Lajoie, K. Das, T. Kempel, Dong-Hun Kim, K. Tanida, V. Papavassiliou, Gerd Joachim Kunde, E. P. Hartouni, A. Kozlov, I. Shein, H. Torii, Ryugo S. Hayano, R. Belmont, R. Seto, J. S. Kapustinsky, L. Baksay, I. J. Choi, A. Kravitz, M. McCumber, Peter Christiansen, V. Babintsev, T. V. Moukhanova, A. Enokizono, M. Gonin, C. Pinkenburg, Y. Riabov, L. Tomášek, D. Hornback, V. S. Pantuev, P. Liebing, I. Danchev, D. Winter, G. S. Kyle, D. Yu Peressounko, P. Mikeš, Kenta Shigaki, K. S. Joo, Marisilvia Donadelli, V. Bumazhnov, James Alexander, K. Sedgwick, R. Tanabe, Rushan Han, G. Roche, J. Jin, A. Sukhanov, K. Kurita, H. Pereira, M. Nguyen, A. Taranenko, E. M. Takagui, E. J. Desmond, J. Hanks, R. Averbeck, Byung-Sik Hong, M. Togawa, J. Hamblen, E. Vazquez-Zambrano, A. Yu. Semenov, S. Sawada, A. Bazilevsky, A. S. Nyanin, Kazushi Miki, Y. Morino, Alice Mignerey, Rachid Nouicer, J. Ying, A. Franz, M. Proissl, Brajesh K. Singh, H. Qu, J. Park, Philippe Rosnet, A. Rakotozafindrabe, Alexandre Lebedev, T. C. Awes, C. Baumann, Kyoichiro Ozawa, T. Liška, J. S. Bok, Hideki Hamagaki, K. Aoki, G. David, Y. Tsuchimoto, S. Kametani, M. Naglis, C. L. Silva, K. Okada, R. Pak, S. Esumi, B. Sahlmueller, Takao Sakaguchi, Tadaaki Isobe, K. I. Hahn, D. M. Lee, D. Sharma, H. En'yo, R. Ichimiya, M. J. Leitch, I. E. Yushmanov, A. D. Frawley, M. Slunečka, P. L. McGaughey, K. Kiriluk, Eun-Hee Kim, C. P. Singh, R. Vértesi, Vladimir Samsonov, Martin Purschke, K. Watanabe, B. M. Johnson, S. Huang, S. Yokkaichi, K. Shoji, W. Holzmann, A. Isupov, T. Horaguchi, P. W. Stankus, J. Sziklai, A. Morreale, K. Karatsu, Z. Fraenkel, R. K. Choudhury, Brian Cole, R. S. Towell, J. E. Frantz, J. Murata, I. Garishvili, F. Wei, Kyeongpil Lee, J. Ide, Tamas Ferenc Csorgo, C. Y. Chi, J. L. Nagle, Anne Marie Sickles, G. R. Young, K. S. Sim, P. Chung, R. Yang, A. Datta, K. Imai, Taku Gunji, H. Gong, J. Seele, F. Kajihara, Y. Onuki, Jan Rak, R. Lacey, R. Granier de Cassagnac, A. Adare, S. Butsyk, S. Zhou, S. D. Rolnick, Ajit Kumar Mohanty, T. A. Shibata, T. Sato, D. Isenhower, A. Toia, F. Matathias, Kensuke Homma, E. Richardson, P. Constantin, B. Bassalleck, M. Konno, R. P. Pisani, J. T. Mitchell, Y. Fukao, R. Seidl, Vladislav Manko, T. Hester, S. Belikov, N. A. Sparks, N. Grau, C. Vale, Christine Angela Aidala, Y. Nakamiya, D. Lynch, Motoi Inaba, R. M. Wright, G. Baksay, Y. J. Kim, A. Kiss, Henner Buesching, Steve Edwards, Marcus Hohlmann, L. A. Linden Levy, K. Sakashita, A. K. Purwar, K. Fujiwara, Y. L. Yamaguchi, E. Leitner, H. W. Van Hecke, S. Bathe, Agneta Oskarsson, Y. Berdnikov, Y. Akiba, M. Mishra, S. Nagamiya, Vaclav Vrba, Klaus Johannes Reygers, Rui Wei, Jason Kamin, M. Csanad, S. P. Stoll, S. S.E. Rosendahl, G. Bunce, D. Jouan, N. Kamihara, A. Drees, M. Chiu, C. A. Ogilvie, T. K. Hemmick, J. M. Durham, Yasuo Miake, L. Kochenda, M. Issah, Zvi Hirsh Citron, K. Nakano, W. E. Sondheim, D. Ivanischev, K. Boyle, P. A. Rukoyatkin, Takahiro Fusayasu, Alexander Malakhov, D. Silvermyr, L. S. Zolin, W. J. Park, Christopher Rosen, A. Yanovich, B. Meredith, John Hill, Toru Sugitate, and François Fleuret

Subjects
Quark, Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Nuclear Theory, Hadron, Kinetic energy, 01 natural sciences, Nuclear physics, Pion, 0103 physical sciences, High Energy Physics::Experiment, Impact parameter, Nuclear Experiment, 010306 general physics, Anisotropy, Relativistic Heavy Ion Collider, Scaling
Abstract

Measurements of the anisotropy parameter v(2) of identified hadrons (pions, kaons, and protons) as a function of centrality, transverse momentum p(T), and transverse kinetic energy KET at midrapidity (vertical bar eta vertical bar < 0.35) in Au + Au collisions at root s(N N) = 200 GeV are presented. Pions and protons are identified up to p(T) = 6 GeV/c, and kaons up to p(T) = 4 GeV/c, by combining information from time-of-flight and aerogel Cerenkov detectors in the PHENIX Experiment. The scaling of v(2) with the number of valence quarks (n(q)) has been studied in different centrality bins as a function of transverse momentum and transverse kinetic energy. A deviation from previously observed quark-number scaling is observed at large values of KET/n(q) in noncentral Au + Au collisions (20-60%), but this scaling remains valid in central collisions (0-10%).

Published
2012
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130. Measurement of direct photons in Au+Au collisions at √(s(NN))=200 GeV

Author

S, Afanasiev, C, Aidala, N N, Ajitanand, Y, Akiba, A, Al-Jamel, J, Alexander, K, Aoki, L, Aphecetche, R, Armendariz, S H, Aronson, R, Averbeck, T C, Awes, B, Azmoun, V, Babintsev, A, Baldisseri, K N, Barish, P D, Barnes, B, Bassalleck, S, Bathe, S, Batsouli, V, Baublis, F, Bauer, A, Bazilevsky, S, Belikov, R, Bennett, Y, Berdnikov, M T, Bjorndal, J G, Boissevain, H, Borel, K, Boyle, M L, Brooks, D S, Brown, D, Bucher, H, Buesching, V, Bumazhnov, G, Bunce, J M, Burward-Hoy, S, Butsyk, S, Campbell, J-S, Chai, S, Chernichenko, C Y, Chi, J, Chiba, M, Chiu, I J, Choi, T, Chujo, V, Cianciolo, C R, Cleven, Y, Cobigo, B A, Cole, M P, Comets, M, Connors, P, Constantin, M, Csanád, T, Csörgő, T, Dahms, K, Das, G, David, H, Delagrange, A, Denisov, D, d'Enterria, A, Deshpande, E J, Desmond, O, Dietzsch, A, Dion, J L, Drachenberg, O, Drapier, A, Drees, A K, Dubey, A, Durum, V, Dzhordzhadze, Y V, Efremenko, J, Egdemir, A, Enokizono, H, En'yo, B, Espagnon, S, Esumi, D E, Fields, F, Fleuret, S L, Fokin, B, Forestier, Z, Fraenkel, J E, Frantz, A, Franz, A D, Frawley, Y, Fukao, S-Y, Fung, S, Gadrat, F, Gastineau, M, Germain, A, Glenn, M, Gonin, J, Gosset, Y, Goto, R, Granier de Cassagnac, N, Grau, S V, Greene, M, Grosse Perdekamp, T, Gunji, H-Å, Gustafsson, T, Hachiya, A, Hadj Henni, J S, Haggerty, M N, Hagiwara, H, Hamagaki, H, Harada, E P, Hartouni, K, Haruna, M, Harvey, E, Haslum, K, Hasuko, R, Hayano, X, He, M, Heffner, T K, Hemmick, J M, Heuser, H, Hiejima, J C, Hill, R, Hobbs, M, Holmes, W, Holzmann, K, Homma, B, Hong, T, Horaguchi, M G, Hur, T, Ichihara, H, Iinuma, K, Imai, J, Imrek, M, Inaba, D, Isenhower, L, Isenhower, M, Ishihara, T, Isobe, M, Issah, A, Isupov, B V, Jacak, J, Jia, J, Jin, O, Jinnouchi, B M, Johnson, K S, Joo, D, Jouan, F, Kajihara, S, Kametani, N, Kamihara, M, Kaneta, J H, Kang, T, Kawagishi, A V, Kazantsev, S, Kelly, A, Khanzadeev, D J, Kim, E, Kim, Y-S, Kim, E, Kinney, A, Kiss, E, Kistenev, A, Kiyomichi, C, Klein-Boesing, L, Kochenda, V, Kochetkov, B, Komkov, M, Konno, D, Kotchetkov, A, Kozlov, P J, Kroon, G J, Kunde, N, Kurihara, K, Kurita, M J, Kweon, Y, Kwon, G S, Kyle, R, Lacey, J G, Lajoie, A, Lebedev, Y, Le Bornec, S, Leckey, D M, Lee, M K, Lee, M J, Leitch, M A L, Leite, X H, Li, H, Lim, A, Litvinenko, M X, Liu, C F, Maguire, Y I, Makdisi, A, Malakhov, M D, Malik, V I, Manko, H, Masui, F, Matathias, M C, McCain, P L, McGaughey, Y, Miake, T E, Miller, A, Milov, S, Mioduszewski, G C, Mishra, J T, Mitchell, D P, Morrison, J M, Moss, T V, Moukhanova, D, Mukhopadhyay, J, Murata, S, Nagamiya, Y, Nagata, J L, Nagle, M, Naglis, T, Nakamura, J, Newby, M, Nguyen, B E, Norman, A S, Nyanin, J, Nystrand, E, O'Brien, C A, Ogilvie, H, Ohnishi, I D, Ojha, K, Okada, O O, Omiwade, A, Oskarsson, I, Otterlund, K, Ozawa, R, Pak, D, Pal, A P T, Palounek, V, Pantuev, V, Papavassiliou, J, Park, W J, Park, S F, Pate, H, Pei, J-C, Peng, H, Pereira, V, Peresedov, D Yu, Peressounko, C, Pinkenburg, R P, Pisani, M L, Purschke, A K, Purwar, H, Qu, J, Rak, I, Ravinovich, K F, Read, M, Reuter, K, Reygers, V, Riabov, Y, Riabov, G, Roche, A, Romana, M, Rosati, S S E, Rosendahl, P, Rosnet, P, Rukoyatkin, V L, Rykov, S S, Ryu, B, Sahlmueller, N, Saito, T, Sakaguchi, S, Sakai, V, Samsonov, H D, Sato, S, Sato, S, Sawada, V, Semenov, R, Seto, D, Sharma, T K, Shea, I, Shein, T-A, Shibata, K, Shigaki, M, Shimomura, T, Shohjoh, K, Shoji, A, Sickles, C L, Silva, D, Silvermyr, K S, Sim, C P, Singh, V, Singh, S, Skutnik, W C, Smith, A, Soldatov, R A, Soltz, W E, Sondheim, S P, Sorensen, I V, Sourikova, F, Staley, P W, Stankus, E, Stenlund, M, Stepanov, A, Ster, S P, Stoll, T, Sugitate, C, Suire, J P, Sullivan, J, Sziklai, T, Tabaru, S, Takagi, E M, Takagui, A, Taketani, K H, Tanaka, Y, Tanaka, K, Tanida, M J, Tannenbaum, A, Taranenko, P, Tarján, T L, Thomas, M, Togawa, J, Tojo, H, Torii, R S, Towell, V-N, Tram, I, Tserruya, Y, Tsuchimoto, S K, Tuli, H, Tydesjö, N, Tyurin, C, Vale, H, Valle, H W, van Hecke, J, Velkovska, R, Vértesi, A A, Vinogradov, E, Vznuzdaev, M, Wagner, X R, Wang, Y, Watanabe, J, Wessels, S N, White, N, Willis, D, Winter, C L, Woody, M, Wysocki, W, Xie, A, Yanovich, S, Yokkaichi, G R, Young, I, Younus, I E, Yushmanov, W A, Zajc, O, Zaudtke, C, Zhang, J, Zimányi, and L, Zolin

Abstract

We report the measurement of direct photons at midrapidity in Au+Au collisions at √(s(NN))=200 GeV. The direct photon signal was extracted for the transverse momentum range of 4 GeV/cp(T)22 GeV/c, using a statistical method to subtract decay photons from the inclusive photon sample. The direct photon nuclear modification factor R(AA) was calculated as a function of p(T) for different Au+Au collision centralities using the measured p+p direct photon spectrum and compared to theoretical predictions. R(AA) was found to be consistent with unity for all centralities over the entire measured p(T) range. Theoretical models that account for modifications of initial direct photon production due to modified parton distribution functions in Au and the different isospin composition of the nuclei predict a modest change of R(AA) from unity. They are consistent with the data. Models with compensating effects of the quark-gluon plasma on high-energy photons, such as suppression of jet-fragmentation photons and induced-photon bremsstrahlung from partons traversing the medium, are also consistent with this measurement.

Published
2012

131. Ground and excited state charmonium production inp+pcollisions ats=200 GeV

Author

J. Gosset, S. Yokkaichi, Y. Ikeda, J. G. Boissevain, E. J. Mannel, C. Pinkenburg, M. Stepanov, G. Roche, Y. J. Mao, J. H. Kang, J. S. Haggerty, Y. S. Lai, J. T. Mitchell, V. S. Pantuev, Y. Onuki, Maya Hachiya Shimomura, I. Ravinovich, M. Gonin, Jan Rak, K. A. Drees, A. V. Kazantsev, E. H. Kim, X. Jiang, R. Lacey, K. S. Joo, Mate Csanad, Y. I. Makdisi, Vladimir Samsonov, A. Kiss, Alexander Milov, I. Nakagawa, R. Seidl, Vladislav Manko, C. L. Woody, A. Berdnikov, K. N. Barish, J. Hamblen, S. Nam, A. Sukhanov, H. Pereira, R. Vértesi, T. Ichihara, Hongfang Liu, D. E. Fields, B. V. Jacak, L. Tomášek, T. Engelmore, O. Drapier, Frank Ellinghaus, R. Pak, S. Sano, Ajit Kumar Mohanty, K. V. Dharmawardane, M. Bai, M. Slunečka, R. Granier de Cassagnac, A. Adare, E. R. Kinney, D. P. Morrison, M. Nihashi, M. McCumber, T. A. Shibata, C. L. Silva, K. Okada, Henner Buesching, B. Sahlmueller, T. Sato, Steve Edwards, H. En'yo, Takahiro Fusayasu, H. Iinuma, Y. Morino, M. J. Tannenbaum, S. Campbell, Tamas Ferenc Csorgo, David D'Enterria, M. J. Leitch, N. Kamihara, H. Torii, K. Das, S. Belikov, J. L. Nagle, S. Tarafdar, J. Hanks, N. Apadula, E. P. Hartouni, A. Kim, Sung Keun Park, Charles Maguire, L. Aphecetche, V. E. Semenov, Tatsuya Chujo, A. Caringi, D. Mukhopadhyay, S. Rembeczki, R. P. Pisani, M. L. Brooks, T. C. Awes, D. Isenhower, Marcus Hohlmann, N. N. Ajitanand, A. Toia, G. Grim, A. P.T. Palounek, Kyoichiro Ozawa, T. Liška, J. S. Bok, I. Tserruya, J. E. Frantz, L. Mašek, Alexander Malakhov, Kazuyoshi Kurita, Alice Mignerey, O. Dietzsch, Eva Haslum, G. S. Kyle, B. Lenzi, Jun Kikuchi, L. D'Orazio, K. Watanabe, Yu. Efremenko, T. Niita, V. Singh, B. Love, C. Vale, Takahiro Nakamura, B. S. Chang, C. Oakley, A. Drees, James Alexander, Marisilvia Donadelli, K. Karatsu, L. A. Linden Levy, V. Bumazhnov, Aaron Angerami, E. T. Atomssa, Y. Fukao, J. L. Charvet, A. Dion, P. Mikeš, R. Averbeck, K. Shoji, Christine Angela Aidala, Susumu Oda, Byung-Sik Hong, J. Klay, H. Valle, S. Afanasiev, D. Silvermyr, T. Hester, Andry Malala Rakotozafindrabe, A. Ster, Takao Sakaguchi, A. Bazilevsky, S. Esumi, Zhiying You, Dmitry Blau, Anne Marie Sickles, S. P. Sorensen, C. Klein-Boesing, R. Bennett, R. Tanabe, A. Durum, M. Kawashima, Philippe Rosnet, Dipanwita Dutta, J. Newby, W. A. Zajc, M. Kurosawa, D. Layton, L. S. Zolin, Johannes Peter Wessels, E. J. Desmond, I. V. Sourikova, Catherine Micaela Silvestre, A. Enokizono, Alexandre Lebedev, A. D. Frawley, K. O. Eyser, A. K. Purwar, K. Fujiwara, Minghui Liu, W. J. Park, Christopher Rosen, Y. L. Yamaguchi, P. W. Stankus, A. G. Litvinenko, O. Chvala, K. Yamaura, V. Baublis, P. Chung, D. M. Lee, S. Huang, A. Hadj Henni, M. Finger, W. C. Chang, Kiyoshi Tanida, F. Matathias, Julia Velkovska, A. Denisov, M. Kasai, V. Cianciolo, Kensuke Homma, P. D. Barnes, A. Yanovich, Seong H. Kim, E. Richardson, M. Togawa, E. Vazquez-Zambrano, M. Heffner, J. Park, M. Rosati, J. Imrek, D. Hornback, V-N. Tram, N. Grau, W. Holzmann, K. Kiriluk, Y. Tomita, Jongmin Lee, Kenneth Francis Read, A. Glenn, Beomkyu Kim, K. Boyle, Wei Xie, Rushan Han, C. A. Ogilvie, J. G. Lajoie, P. Constantin, B. Komkov, A. Datta, Sergey Fokin, S. Chernichenko, E. Kistenev, Eunja Kim, M. Ouchida, Taku Gunji, H. Gong, Kisung Lee, A. Taranenko, J. Seele, K. I. Hahn, T. K. Hemmick, Y. Tsuchimoto, Y. Iwanaga, B. Bassalleck, D. Lynch, Motoi Inaba, F. Kajihara, R. M. Wright, Tadaaki Isobe, Jen-Chieh Peng, Norio Saito, Tsutomu Mibe, J. M. Durham, B. Meredith, G. R. Young, I. J. Choi, A. Kravitz, N. Means, H. W. Van Hecke, M. A. L. Leite, Kazushi Miki, Yasuo Miake, A. A. Vinogradov, T. Horaguchi, A. Kozlov, R. Seto, K. Haruna, I. E. Yushmanov, M. Konno, K. B. Lee, J. Asai, Brajesh K. Singh, P. Lichtenwalner, Jiangyong Jia, Alexei Khanzadeev, Y. Goto, S. Butsyk, P. L. McGaughey, Inkyu Park, John Hill, H. A. Gustafsson, D. S. Jumper, S. Bathe, E. Stenlund, R. Belmont, L. Kochenda, M. Issah, Xiong Wang, Z. Conesa del Valle, Agneta Oskarsson, M. Chiu, Y. Nakamiya, Dong Jo Kim, V. L. Rykov, T. Dahms, J. B. Choi, S. Zhou, Shingo Sakai, J. S. Kapustinsky, V. Babintsev, Toru Sugitate, H. Qu, C. Zhang, Y. Berdnikov, D. Kleinjan, A. Baldisseri, S. Dairaku, S. D. Rolnick, K. Sakashita, T. L. Thomas, I. Danchev, Y. Akiba, P. Ružička, G. Baksay, M. Mishra, S. Nagamiya, D. Roach, K. M. Kijima, O. Zaudtke, A. Veicht, J. H. Bhom, X. He, Hideki Hamagaki, K. Aoki, Viktor Riabov, Vaclav Vrba, Klaus Johannes Reygers, Rui Wei, Ryugo S. Hayano, M. Virius, T. V. Moukhanova, M. I. Nagy, K. S. Sim, V. Dzhordzhadze, G. David, Jason Kamin, Y. Aramaki, D. Watanabe, Y. Riabov, S. P. Stoll, Xingguo Li, Kenta Shigaki, François Fleuret, M. D. Malik, M. Nguyen, Y. Kwon, E. Vznuzdaev, V. Peresedov, Y. J. Kim, R. A. Soltz, H. Borel, C. H. Chen, R. Yang, S. S.E. Rosendahl, A. S. Nyanin, G. Bunce, S. N. White, Rachid Nouicer, J. Koster, M. Proissl, M. Grosse Perdekamp, Deepa Thomas, S. Taneja, A. Churyn, M. E. Connors, D. Jouan, Y. Tanaka, Zvi Hirsh Citron, K. Imai, K. Nakano, T. Kempel, W. E. Sondheim, D. Ivanischev, S. Batsouli, H. Masui, A. K. Dubey, Dong-Hun Kim, P. A. Rukoyatkin, T. Jones, A. A. Bickley, Peter Christiansen, D. Winter, D. Yu Peressounko, P. Tarján, H. J. Moon, L. Baksay, H. Pei, Senta Greene, A. T. Basye, B. Fadem, E. O'Brien, C. Baumann, S. Kametani, C. P. Singh, B. M. Johnson, T. Murakami, A. Deshpande, R. J. Petti, A. Isupov, C. Suire, J. Sziklai, Brian Cole, S. Sawada, J. Ying, A. Franz, D. Sharma, Y. Watanabe, R. Ichimiya, Tae-Yeon Lee, Martin Purschke, I. Younus, A. Morreale, Z. Fraenkel, M. K. Dayananda, R. K. Choudhury, B. Azmoun, A. Král, M. J. Kweon, M. Wysocki, J. Jin, E. M. Takagui, A. Soldatov, M. Oka, R. S. Towell, I. Garishvili, F. Wei, Atsushi Taketani, P. Liebing, C. M. Camacho, Prashant Shukla, S. F. Pate, Ke. Nakamura, H. Al-Bataineh, M. Naglis, V. Papavassiliou, C. Y. Chi, Masayasu Ishihara, F. Staley, D. Kawall, H. Themann, J. Murata, Gerd Joachim Kunde, I. Shein, K. Sedgwick, and A. Yu. Semenov

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Context (language use), 01 natural sciences, Nuclear physics, Particle decay, Excited state, 0103 physical sciences, Production model, Statistical precision, High Energy Physics::Experiment, Production (computer science), Rapidity, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider
Abstract

We report on charmonium measurements [J/psi (1S), psi' (2S), and chi(c) (1P)] in p + p collisions at root s = 200 GeV. We find that the fraction of J/psi coming from the feed-down decay of psi' and chi(c) in the midrapidity region (vertical bar y vertical bar < 0: 35) is 9.6 +/- 2.4% and 32 +/- 9%, respectively. We also present the p(T) and rapidity dependencies of the J/psi yield measured via dielectron decay at midrapidity (vertical bar y vertical bar < 0.35) and via dimuon decay at forward rapidity (1.2 < vertical bar y vertical bar < 2.2). The statistical precision greatly exceeds that reported in our previous publication [Phys. Rev. Lett. 98, 232002 (2007)]. The new results are compared with other experiments and discussed in the context of current charmonium production models.

Published
2012
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132. Evolution of π(0) suppression in Au+Au collisions from √(s(NN))=39 to 200 GeV

Author

A, Adare, S, Afanasiev, C, Aidala, N N, Ajitanand, Y, Akiba, R, Akimoto, H, Al-Ta'ani, J, Alexander, A, Angerami, K, Aoki, N, Apadula, Y, Aramaki, H, Asano, E C, Aschenauer, E T, Atomssa, T C, Awes, B, Azmoun, V, Babintsev, M, Bai, B, Bannier, K N, Barish, B, Bassalleck, S, Bathe, V, Baublis, S, Baumgart, A, Bazilevsky, R, Belmont, A, Berdnikov, Y, Berdnikov, X, Bing, D S, Blau, K, Boyle, M L, Brooks, H, Buesching, V, Bumazhnov, S, Butsyk, S, Campbell, P, Castera, C-H, Chen, C Y, Chi, M, Chiu, I J, Choi, J B, Choi, S, Choi, R K, Choudhury, P, Christiansen, T, Chujo, O, Chvala, V, Cianciolo, Z, Citron, B A, Cole, M, Connors, M, Csanád, T, Csörgő, S, Dairaku, A, Datta, M S, Daugherity, G, David, A, Denisov, A, Deshpande, E J, Desmond, K V, Dharmawardane, O, Dietzsch, L, Ding, A, Dion, M, Donadelli, O, Drapier, A, Drees, K A, Drees, J M, Durham, A, Durum, L, D'Orazio, S, Edwards, Y V, Efremenko, T, Engelmore, A, Enokizono, S, Esumi, K O, Eyser, B, Fadem, D E, Fields, M, Finger, F, Fleuret, S L, Fokin, J E, Frantz, A, Franz, A D, Frawley, Y, Fukao, T, Fusayasu, K, Gainey, C, Gal, A, Garishvili, I, Garishvili, A, Glenn, X, Gong, M, Gonin, Y, Goto, R, Granier de Cassagnac, N, Grau, S V, Greene, M, Grosse Perdekamp, T, Gunji, L, Guo, H-Å, Gustafsson, T, Hachiya, J S, Haggerty, K I, Hahn, H, Hamagaki, J, Hanks, K, Hashimoto, E, Haslum, R, Hayano, X, He, T K, Hemmick, T, Hester, J C, Hill, R S, Hollis, K, Homma, B, Hong, T, Horaguchi, Y, Hori, S, Huang, T, Ichihara, H, Iinuma, Y, Ikeda, J, Imrek, M, Inaba, A, Iordanova, D, Isenhower, M, Issah, A, Isupov, D, Ivanischev, B V, Jacak, M, Javani, J, Jia, X, Jiang, B M, Johnson, K S, Joo, D, Jouan, J, Kamin, S, Kaneti, B H, Kang, J H, Kang, J S, Kang, J, Kapustinsky, K, Karatsu, M, Kasai, D, Kawall, A V, Kazantsev, T, Kempel, A, Khanzadeev, K M, Kijima, B I, Kim, C, Kim, D J, Kim, E-J, Kim, H J, Kim, K-B, Kim, Y-J, Kim, Y K, Kim, E, Kinney, A, Kiss, E, Kistenev, J, Klatsky, D, Kleinjan, P, Kline, Y, Komatsu, B, Komkov, J, Koster, D, Kotchetkov, D, Kotov, A, Král, F, Krizek, G J, Kunde, K, Kurita, M, Kurosawa, Y, Kwon, G S, Kyle, R, Lacey, Y S, Lai, J G, Lajoie, A, Lebedev, B, Lee, D M, Lee, J, Lee, K B, Lee, K S, Lee, S H, Lee, S R, Lee, M J, Leitch, M A L, Leite, M, Leitgab, B, Lewis, S H, Lim, L A, Linden Levy, A, Litvinenko, M X, Liu, B, Love, C F, Maguire, Y I, Makdisi, M, Makek, A, Malakhov, A, Manion, V I, Manko, E, Mannel, S, Masumoto, M, McCumber, P L, McGaughey, D, McGlinchey, C, McKinney, M, Mendoza, B, Meredith, Y, Miake, T, Mibe, A C, Mignerey, A, Milov, D K, Mishra, J T, Mitchell, Y, Miyachi, S, Miyasaka, A K, Mohanty, H J, Moon, D P, Morrison, S, Motschwiller, T V, Moukhanova, T, Murakami, J, Murata, T, Nagae, S, Nagamiya, J L, Nagle, M I, Nagy, I, Nakagawa, Y, Nakamiya, K R, Nakamura, T, Nakamura, K, Nakano, C, Nattrass, A, Nederlof, M, Nihashi, R, Nouicer, N, Novitzky, A S, Nyanin, E, O'Brien, C A, Ogilvie, K, Okada, A, Oskarsson, M, Ouchida, K, Ozawa, R, Pak, V, Pantuev, V, Papavassiliou, B H, Park, I H, Park, S K, Park, S F, Pate, L, Patel, H, Pei, J-C, Peng, H, Pereira, V, Peresedov, D Yu, Peressounko, R, Petti, C, Pinkenburg, R P, Pisani, M, Proissl, M L, Purschke, H, Qu, J, Rak, I, Ravinovich, K F, Read, R, Reynolds, V, Riabov, Y, Riabov, E, Richardson, D, Roach, G, Roche, S D, Rolnick, M, Rosati, P, Rukoyatkin, B, Sahlmueller, N, Saito, T, Sakaguchi, V, Samsonov, M, Sano, M, Sarsour, S, Sawada, K, Sedgwick, R, Seidl, A, Sen, R, Seto, D, Sharma, I, Shein, T-A, Shibata, K, Shigaki, M, Shimomura, K, Shoji, P, Shukla, A, Sickles, C L, Silva, D, Silvermyr, K S, Sim, B K, Singh, C P, Singh, V, Singh, M, Slunečka, R A, Soltz, W E, Sondheim, S P, Sorensen, M, Soumya, I V, Sourikova, P W, Stankus, E, Stenlund, M, Stepanov, A, Ster, S P, Stoll, T, Sugitate, A, Sukhanov, J, Sun, J, Sziklai, E M, Takagui, A, Takahara, A, Taketani, Y, Tanaka, S, Taneja, K, Tanida, M J, Tannenbaum, S, Tarafdar, A, Taranenko, E, Tennant, H, Themann, T, Todoroki, L, Tomášek, M, Tomášek, H, Torii, R S, Towell, I, Tserruya, Y, Tsuchimoto, T, Tsuji, C, Vale, H W, van Hecke, M, Vargyas, E, Vazquez-Zambrano, A, Veicht, J, Velkovska, R, Vértesi, M, Virius, A, Vossen, V, Vrba, E, Vznuzdaev, X R, Wang, D, Watanabe, K, Watanabe, Y, Watanabe, Y S, Watanabe, F, Wei, R, Wei, S N, White, D, Winter, S, Wolin, C L, Woody, M, Wysocki, Y L, Yamaguchi, R, Yang, A, Yanovich, J, Ying, S, Yokkaichi, Z, You, I, Younus, I E, Yushmanov, W A, Zajc, A, Zelenski, and L, Zolin

Abstract

Neutral-pion π(0) spectra were measured at midrapidity (|y|0.35) in Au+Au collisions at √(s(NN))=39 and 62.4 GeV and compared with earlier measurements at 200 GeV in a transverse-momentum range of 1p(T)10 GeV/c. The high-p(T) tail is well described by a power law in all cases, and the powers decrease significantly with decreasing center-of-mass energy. The change of powers is very similar to that observed in the corresponding spectra for p+p collisions. The nuclear modification factors (R(AA)) show significant suppression, with a distinct energy, centrality, and p(T) dependence. Above p(T)=7 GeV/c, R(AA) is similar for √(s(NN))=62.4 and 200 GeV at all centralities. Perturbative-quantum-chromodynamics calculations that describe R(AA) well at 200 GeV fail to describe the 39 GeV data, raising the possibility that, for the same p(T) region, the relative importance of initial-state effects and soft processes increases at lower energies. The p(T) range where π(0) spectra in central Au+Au collisions have the same power as in p+p collisions is ≈5 and 7 GeV/c for √(s(NN))=200 and 62.4 GeV, respectively. For the √(s(NN))=39 GeV data, it is not clear whether such a region is reached, and the x(T) dependence of the x(T)-scaling power-law exponent is very different from that observed in the √(s(NN))=62 and 200 GeV data, providing further evidence that initial-state effects and soft processes mask the in-medium suppression of hard-scattered partons to higher p(T) as the collision energy decreases.

Published
2012

133. Two novel methods for the determination of the number of components in independent components analysis models

Author

D. Jouan-Rimbaud Bouveresse, A. Moya-González, Douglas N. Rutledge, Faten Ammari, Ingénierie Procédés Aliments (GENIAL), Institut National de la Recherche Agronomique (INRA)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-AgroParisTech-Conservatoire National des Arts et Métiers [CNAM] (CNAM), LPF Tagralia, Universidad Politécnica de Madrid (UPM), Faculté des Sciences de Bizerte [Université de Carthage], Université de Carthage - University of Carthage, and Fac Sci Bizerte Jarzouna 7021

Subjects
Blind deconvolution, [SDV.SA]Life Sciences [q-bio]/Agricultural sciences, EXTRACTION, Separation (statistics), BLIND DECONVOLUTION, 02 engineering and technology, Latent variable, 01 natural sciences, Blind signal separation, Analytical Chemistry, INFRARED-SPECTROSCOPY, ARTIFACTS, Statistics, Validation, REGRESSION, SPECTRA, ICA, ALGORITHM, Durbin-Watson criterion, Spectroscopy, Mathematics, Structure (mathematical logic), business.industry, Process Chemistry and Technology, 010401 analytical chemistry, Pattern recognition, Function (mathematics), Química, Independent Components Analysis (ICA), 021001 nanoscience & nanotechnology, Independent component analysis, Regression, 0104 chemical sciences, Computer Science Applications, SEPARATION, Artificial intelligence, CONSTITUENTS, 0210 nano-technology, business, Software
Abstract

Independent Components Analysis is a Blind Source Separation method that aims to find the pure source signals mixed together in unknown proportions in the observed signals under study. It does this by searching for factors which are mutually statistically independent. It can thus be classified among the latent-variable based methods. Like other methods based on latent variables, a careful investigation has to be carried out to find out which factors are significant and which are not. Therefore, it is important to dispose of a validation procedure to decide on the optimal number of independent components to include in the final model. This can be made complicated by the fact that two consecutive models may differ in the order and signs of similarly-indexed ICs. As well, the structure of the extracted sources can change as a function of the number of factors calculated. Two methods for determining the optimal number of ICs are proposed in this article and applied to simulated and real datasets to demonstrate their performance. (c) 2012 Elsevier B.V. All rights reserved.

Published
2012
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134. ψi and production in p-U and S-U collisions at 200

Author

J.-R. Pizzi, Ph. Gorodetzky, Bruno Espagnon, M.C. Abreu, X. Tarrago, F. Malek, Didier Contardo, A. Bussiere, Joao Varela, R.A. Salmeron, P. Sonderegger, C. Racca, A. Romana, R. Ferreira, A. Guichard, Carlos Lourenco, L. Luquin, L. Kluberg, P. Force, Francois Vazeille, J.-Y. Grossiord, B. Ronceux, P. Liaud, R. Kossakowski, E. Descroix, C. Barriere, T. Chambon, R. Haroutunian, J. Fargeix, S. Silva, D. Lazic, G. Landaud, D. Jouan, A. Baldit, C. Baglin, Luis Peralta, P. Bordalo, L. Fredj, A. Devaux, J. Castor, M. Bedjidian, B. Chaurand, J.M. Gago, O. Drapier, B. Grosdidier, C. Gersche, Rachid Mazini, J.P. Guillaud, R. Mandry, and S. Ramos

Subjects
Physics, Nuclear and High Energy Physics, Muon, Meson, 010308 nuclear & particles physics, Branching fraction, Hadron, Quarkonium, 01 natural sciences, Nuclear physics, Particle decay, Pair production, 0103 physical sciences, Atomic physics, 010306 general physics, Nucleon
Abstract

Production and decay into two muons of ψI and J/ψ mesons is studied in p-U and S-U interactions at 200 GeV/nucleon. The ratio Bmumuσ(ψl)/Bmumuσ(J/ψ is found to be 0.0201 ± 0.0044 ± 0.0020 in p-U and 0.0093 ± 0.0011 ± 0.0013 in S-U. For S-U interactions, this ratio decreases by about 40% with increasing transverse energy. Our p-U result confirms previous measurements which show that the relative production of ψt and J ψ in p-A interactions is independent of A. The results are discussed in the frame of QGP formation and final state absorption.

Published
1994
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135. ψ′ and muon pair production in p-W and S-U collisions

Author

F. Malek, Joao Varela, C. Racca, Bruno Espagnon, P. Sonderegger, L. Luquin, B. Ronceux, G. Landaud, Ph. Gorodetzky, X. Tarrago, C. Baglin, P. Liaud, C. Barriere, A. Baldit, J.-R. Pizzi, E. Descroix, P. Bordalo, R. Kossakowski, S. Ramos, A. Devaux, S. Silva, R. Haroutunian, M.C. Abreu, R.A. Salmeron, J. Castor, B. Grosdidier, J.M. Gago, T. Chambon, R. Ferreira, O. Drapier, A. Guichard, Francois Vazeille, J. Fargeix, A. Romana, R. Mandry, L. Fredj, Luis Peralta, J.-Y. Grossiord, Carlos Lourenco, L. Kluberg, Didier Contardo, Rachid Mazini, J.P. Guillaud, A. Bussiere, D. Jouan, D. Lazic, B. Chaurand, C. Gerschel, M. Bedjidian, and P. Force

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Muon, Meson, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Nuclear Theory, Hadron, Quarkonium, 01 natural sciences, Nuclear physics, Particle decay, Pair production, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Nucleon, Lepton
Abstract

In this paper we present a study on the production of the J ψ and ψ′ resonances, decaying into muon pairs, in S-U collisions, at 200 GeV per incident nucleon. We find that the ratio between ψ′ and tJ ψ yields decreases as E T , the neutral transverse energy produced in the collision, increases. There is also a clear decrease of this ratio when going from p-W to S-U interactions. Assuming the high mass continuum to be Drell-Yan we discuss the possible understanding of the intermediate dimuon mass region as a superposition of Drell-Yan (extrapolated down in mass) and muon pairs from the semileptonic decays of charmed mesons. The p-W data is found to be explained by this procedure. However, the S-U data seems to be incompatible with a linear extrapolation from the proton-nucleus results.

Published
1994
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136. Measurements of Higher Order Flow Harmonics inAu+AuCollisions atsNN=200 GeV

Author

R. Pak, Vladimir Samsonov, Beomkyu Kim, K. Boyle, N. Kamihara, Wei Xie, Ajit Kumar Mohanty, T. A. Shibata, T. Sato, Kazuyoshi Kurita, F. Matathias, M. Ouchida, A. Drees, Tamas Ferenc Csorgo, Kensuke Homma, E. Richardson, K. N. Barish, D. Isenhower, A. Toia, Maya Hachiya Shimomura, Y. I. Makdisi, V. S. Pantuev, A. Yu. Semenov, J. L. Nagle, M. I. Nagy, D. Watanabe, P. Constantin, M. D. Malik, E. Vznuzdaev, J. Hamblen, S. Tarafdar, N. Means, S. P. Sorensen, K. I. Hahn, B. Bassalleck, T. Kempel, Dong-Hun Kim, M. J. Tannenbaum, H. Torii, Eva Haslum, B. Lenzi, Tadaaki Isobe, K. Karatsu, C. Silvestre, Marisilvia Donadelli, V. Bumazhnov, S. Afanasiev, S. Sano, Taku Gunji, H. Gong, J. Seele, F. Kajihara, S. Yokkaichi, B. Meredith, O. Chvala, P. L. McGaughey, Johannes Peter Wessels, Andry Malala Rakotozafindrabe, J. Newby, John Hill, Toru Sugitate, M. Konno, Anne Marie Sickles, R. Tanabe, K. Watanabe, Alice Mignerey, D. Hornback, M. L. Brooks, S. Butsyk, Y. J. Mao, François Fleuret, K. Okada, B. Sahlmueller, J. H. Kang, J. P. Wood, J. S. Haggerty, Seong H. Kim, A. V. Kazantsev, W. A. Zajc, A. Taranenko, V. Baublis, A. Denisov, H. En'yo, R. A. Soltz, K. Shoji, Y. Tanaka, Kazushi Miki, Brajesh K. Singh, X. He, J. T. Mitchell, M. Chiu, T. Ichihara, S. Zhou, M. J. Leitch, J. G. Lajoie, Takahiro Fusayasu, K. A. Drees, L. Tomášek, V. Cianciolo, Sergey Fokin, T. Horaguchi, M. Grosse Perdekamp, P. W. Stankus, M. E. Connors, Y. Aramaki, C. A. Ogilvie, V. Peresedov, Alexander Malakhov, D. Silvermyr, S. D. Rolnick, P. Mikeš, Kisung Lee, Alexander Milov, I. Nakagawa, R. Luechtenborg, T. Engelmore, R. Seidl, Vladislav Manko, Takao Sakaguchi, T. K. Hemmick, L. S. Zolin, G. R. Young, W. J. Park, Christopher Rosen, A. Yanovich, I. J. Choi, A. Kravitz, K. B. Lee, M. Slunečka, K. Tanida, Rushan Han, O. Drapier, J. Koster, Frank Ellinghaus, E. J. Desmond, E. R. Kinney, D. P. Morrison, Y. J. Kwon, M. Kurosawa, T. C. Awes, Kyoichiro Ozawa, T. Liška, J. S. Bok, J. M. Durham, Y. Onuki, Peter Christiansen, A. K. Purwar, K. Fujiwara, A. D. Frawley, D. Winter, S. Belikov, D. Yu Peressounko, S. N. White, Y. L. Yamaguchi, H. Masui, Zvi Hirsh Citron, Y. S. Lai, K. Nakano, Y. Ikeda, S. Campbell, Yasuo Miake, C. L. Woody, A. Berdnikov, A. A. Bickley, E. J. Mannel, W. E. Sondheim, D. Ivanischev, Jan Rak, R. Lacey, P. A. Rukoyatkin, K. Das, E. P. Hartouni, P. Chung, D. Roach, K. M. Kijima, M. Togawa, E. Vazquez-Zambrano, R. Granier de Cassagnac, A. Adare, L. Kochenda, M. Issah, P. Tarján, J. Park, B. Love, L. Baksay, C. Vale, Minghui Liu, H. Qu, M. Heffner, A. Datta, S. Huang, C. Pinkenburg, Kenneth Francis Read, Tatsuya Chujo, I. Tserruya, Yu. Efremenko, Christine Angela Aidala, H. A. Gustafsson, Senta Greene, H. Pei, Xingguo Li, A. G. Litvinenko, E. Leitner, D. Kotchetkov, V. Singh, Y. Nakamiya, C. Zhang, Hideki Hamagaki, K. Aoki, A. T. Basye, G. David, M. Gonin, W. Holzmann, G. Roche, P. Ružička, Y. Tsuchimoto, B. Fadem, E. O'Brien, K. Sakashita, A. Kozlov, R. Seto, K. S. Sim, G. Baksay, O. Dietzsch, Viktor Riabov, E. T. Atomssa, A. Sukhanov, H. Pereira, I. V. Sourikova, T. L. Thomas, Y. Morino, I. Danchev, R. Yang, I. E. Yushmanov, Y. J. Kim, Ryugo S. Hayano, H. Valle, Dipanwita Dutta, K. Imai, Y. Riabov, Alexei Khanzadeev, Kenta Shigaki, M. Nguyen, E. Stenlund, A. S. Nyanin, Rachid Nouicer, H. W. Van Hecke, M. Proissl, Julia Velkovska, Jason Kamin, Eunja Kim, Jen-Chieh Peng, T. V. Moukhanova, Charles Maguire, S. P. Stoll, M. Rosati, R. Vértesi, A. Kiss, Inkyu Park, Henner Buesching, E. Kistenev, Xiong Wang, A. A. Vinogradov, S. S.E. Rosendahl, Steve Edwards, Dong Jo Kim, G. Bunce, J. E. Frantz, Jiangyong Jia, Y. Goto, A. Veicht, Marcus Hohlmann, L. A. Linden Levy, D. Jouan, S. Bathe, Agneta Oskarsson, Y. Berdnikov, Y. Akiba, M. Mishra, S. Nagamiya, Vaclav Vrba, Klaus Johannes Reygers, Rui Wei, S. Dairaku, J. Jin, E. M. Takagui, R. S. Towell, I. Garishvili, F. Wei, Kyeongpil Lee, S. Sawada, J. Ying, A. Franz, M. Virius, J. Ide, C. Y. Chi, C. Baumann, C. H. Chen, S. Kametani, C. P. Singh, B. M. Johnson, A. Glenn, A. Isupov, J. Sziklai, Jongmin Lee, Brian Cole, D. Lynch, D. S. Jumper, T. Dahms, I. Ravinovich, M. Wysocki, M. Bai, C. M. Camacho, M. Naglis, Zhiying You, R. Bennett, M. Kawashima, M. Finger, Prashant Shukla, C. L. Silva, S. F. Pate, H. Al-Bataineh, Masayasu Ishihara, V. Papavassiliou, D. Kawall, H. Themann, J. Murata, Gerd Joachim Kunde, I. Shein, E. H. Kim, K. Sedgwick, A. Deshpande, Y. Watanabe, I. Younus, B. Komkov, Norio Saito, Hongfang Liu, D. E. Fields, M. A. L. Leite, B. V. Jacak, M. McCumber, Y. Fukao, R. Belmont, J. S. Kapustinsky, V. Babintsev, G. S. Kyle, J. Hanks, James Alexander, R. Averbeck, Byung-Sik Hong, T. Hester, Sung Keun Park, N. N. Ajitanand, A. Bazilevsky, Philippe Rosnet, Alexandre Lebedev, D. M. Lee, Takahiro Nakamura, K. Kiriluk, Susumu Oda, N. A. Sparks, A. Durum, K. Yamaura, Martin Purschke, N. Grau, Motoi Inaba, R. M. Wright, Mate Csanad, R. P. Pisani, A. Morreale, Z. Fraenkel, R. K. Choudhury, B. Azmoun, A. Král, M. Oka, A. Dion, Atsushi Taketani, A. Enokizono, P. Liebing, K. S. Joo, S. Esumi, D. Sharma, and R. Ichimiya

Subjects
Nuclear physics, Physics, Harmonics, Monte Carlo method, General Physics and Astronomy, Entropy (information theory), Rapidity, Boundary value problem, Nuclear Experiment, Anisotropy, Collision, Glauber
Abstract

Flow coefficients nu(n) for n = 2, 3, 4, characterizing the anisotropic collective flow in Au + Au collisions at root s(NN) = 200 GeV, are measured relative to event planes Psi(n), determined at large rapidity. We report nu(n) as a function of transverse momentum and collision centrality, and study the correlations among the event planes of different order n. The nu(n) are well described by hydrodynamic models which employ a Glauber Monte Carlo initial state geometry with fluctuations, providing additional constraining power on the interplay between initial conditions and the effects of viscosity as the system evolves. This new constraint can serve to improve the precision of the extracted shear viscosity to entropy density ratio eta/s.

Published
2011
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137. J/ψsuppression at forward rapidity in Au+Au collisions atsNN=200GeV

Author

K. Sakashita, Sung Keun Park, K. S. Joo, N. N. Ajitanand, K. A. Drees, Takahiro Nakamura, Y. J. Kwon, Jason Kamin, Susumu Oda, R. A. Soltz, M. Grosse Perdekamp, M. E. Connors, S. Belikov, S. Esumi, K. Tanida, Peter Christiansen, P. Tarján, D. Winter, S. P. Stoll, D. Roach, K. M. Kijima, A. Durum, Vladimir Samsonov, D. Kotchetkov, Y. Fukao, D. Sharma, Minghui Liu, R. Ichimiya, S. S.E. Rosendahl, G. Bunce, T. Hester, B. Azmoun, A. Král, Y. J. Mao, M. Heffner, E. H. Kim, K. Das, E. P. Hartouni, K. Yamaura, Kenneth Francis Read, D. Jouan, Tamas Ferenc Csorgo, V. S. Pantuev, Senta Greene, A. T. Basye, B. Fadem, E. O'Brien, M. Oka, J. H. Kang, J. S. Haggerty, Xingguo Li, N. A. Sparks, J. L. Nagle, J. Hamblen, Johannes Peter Wessels, M. Gonin, R. Pak, A. Dion, Hongfang Liu, D. E. Fields, N. Kamihara, K. Okada, B. Sahlmueller, H. En'yo, C. Silvestre, Marisilvia Donadelli, V. Bumazhnov, M. J. Leitch, B. V. Jacak, W. A. Zajc, H. Hamagaki, A. Sukhanov, H. Pereira, A. V. Kazantsev, M. Kurosawa, Andry Malala Rakotozafindrabe, M. I. Nagy, Kazuyoshi Kurita, N. Grau, M. McCumber, Y. Morino, V. Baublis, Atsushi Taketani, G. S. Kyle, D. Watanabe, A. Denisov, M. D. Malik, R. Tanabe, E. Vznuzdaev, A. Drees, A. Enokizono, P. Liebing, James Alexander, J. Hanks, R. Averbeck, Byung-Sik Hong, M. Wysocki, A. Bazilevsky, Motoi Inaba, R. M. Wright, Martin Purschke, Sergey Fokin, P. Chung, Rushan Han, L. Tomášek, S. P. Sorensen, Philippe Rosnet, Beomkyu Kim, K. Boyle, Y. Tanaka, H. Å Gustafsson, Wei Xie, M. Chiu, Alexandre Lebedev, C. A. Ogilvie, Shinhong Kim, O. Chvala, Mate Csanad, Kisung Lee, T. K. Hemmick, D. M. Lee, A. Morreale, J. M. Durham, Yasuo Miake, Y. S. Lai, K. Kiriluk, A. Datta, E. J. Desmond, J. G. Lajoie, B. Komkov, P. Mikeš, L. Kochenda, M. Issah, R. K. Choudhury, A. K. Purwar, K. Fujiwara, Taku Gunji, H. Gong, J. Seele, I. J. Choi, Norio Saito, A. Kravitz, L. Baksay, M. A. L. Leite, F. Kajihara, S. Sawada, H. Pei, J. Ying, A. Franz, M. Togawa, E. Vazquez-Zambrano, Y. L. Yamaguchi, R. Belmont, J. S. Kapustinsky, V. Babintsev, O. Dietzsch, R. P. Pisani, S. Butsyk, Maya Hachiya Shimomura, J. Park, C. M. Camacho, Prashant Shukla, C. Zhang, E. T. Atomssa, S. Zhou, H. Valle, S. F. Pate, T. C. Awes, Kyoichiro Ozawa, T. Liška, S. D. Rolnick, J. S. Bok, P. Ružička, Dipanwita Dutta, E. Leitner, H. Al-Bataineh, Tadaaki Isobe, Julia Velkovska, A. Y. Semenov, M. Rosati, Ajit Kumar Mohanty, T. A. Shibata, Y. Tsuchimoto, Y. I. Makdisi, Viktor Riabov, T. Sato, S. Yokkaichi, V. Papavassiliou, A. A. Vinogradov, I. E. Yushmanov, Jiangyong Jia, Alexei Khanzadeev, P. L. McGaughey, Y. Goto, E. Stenlund, D. Isenhower, H. Qu, Y. Ikeda, E. J. Mannel, H. W. Van Hecke, A. Toia, C. Pinkenburg, T. V. Moukhanova, S. Bathe, K. Aoki, R. Vértesi, Agneta Oskarsson, G. Roche, G. David, Y. Berdnikov, Y. Akiba, M. Mishra, J. E. Frantz, S. Nagamiya, Vaclav Vrba, Klaus Johannes Reygers, Rui Wei, M. Naglis, Charles Maguire, A. Kiss, C. L. Silva, Henner Buesching, Steve Edwards, Masayasu Ishihara, Marcus Hohlmann, C. Baumann, S. Kametani, L. A. Linden Levy, A. Deshpande, C. P. Singh, B. M. Johnson, A. Isupov, J. Sziklai, M. J. Tannenbaum, Brian Cole, E. Kistenev, H. Torii, T. Kempel, Dong-Hun Kim, J. Jin, E. M. Takagui, R. S. Towell, I. Garishvili, F. Wei, Kyeongpil Lee, J. T. Mitchell, J. Ide, R. Seidl, Vladislav Manko, M. Slunečka, C. Y. Chi, Y. Watanabe, K. Watanabe, Alice Mignerey, K. Shoji, S. Dairaku, V. Cianciolo, M. Virius, C. H. Chen, T. Horaguchi, I. Younus, P. W. Stankus, A. Glenn, I. Ravinovich, M. Bai, Takao Sakaguchi, D. Kawall, C. Vale, A. D. Frawley, Zhiying You, H. Themann, S. Huang, R. Bennett, M. Kawashima, M. Finger, Christine Angela Aidala, W. Holzmann, M. Ouchida, N. Means, Jongmin Lee, J. Murata, Y. Nakamiya, X. He, Y. Aramaki, V. Peresedov, D. Lynch, T. L. Thomas, J. Koster, Gerd Joachim Kunde, I. Shein, D. S. Jumper, G. Baksay, H. Masui, Ryugo S. Hayano, A. A. Bickley, Y. Riabov, T. Dahms, Kenta Shigaki, K. Sedgwick, M. Nguyen, K. N. Barish, A. S. Nyanin, Rachid Nouicer, M. Proissl, Y. J. Kim, T. Ichihara, J. P. Wood, C. L. Woody, A. Berdnikov, Alexander Milov, Takahiro Fusayasu, S. Sano, I. Nakagawa, Alexander Malakhov, R. Luechtenborg, T. Engelmore, K. Karatsu, D. Silvermyr, O. Drapier, L. S. Zolin, W. J. Park, Christopher Rosen, Frank Ellinghaus, A. Yanovich, E. R. Kinney, S. N. White, D. P. Morrison, S. Campbell, Anne Marie Sickles, Zvi Hirsh Citron, Tatsuya Chujo, I. Tserruya, Yu. Efremenko, K. Nakano, F. Matathias, V. Singh, I. V. Sourikova, M. L. Brooks, W. E. Sondheim, D. Ivanischev, Kensuke Homma, B. Love, P. A. Rukoyatkin, G. R. Young, B. Meredith, Z. Fraenkel, E. Richardson, John Hill, Toru Sugitate, Eunja Kim, Jen-Chieh Peng, K. S. Sim, P. Constantin, A. G. Litvinenko, Inkyu Park, Xiong Wang, K. I. Hahn, Dong Jo Kim, B. Bassalleck, R. Yang, A. Veicht, François Fleuret, A. Kozlov, M. Konno, K. Imai, R. Seto, Y. Onuki, D. Y.-U. Peressounko, Jan Rak, R. Lacey, R. Granier de Cassagnac, A. Adare, I. Danchev, S. Tarafdar, Eva Haslum, B. Lenzi, S. Afanasiev, J. Newby, D. Hornback, A. Taranenko, Kazushi Miki, Brajesh K. Singh, and K. B. Lee

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Quark–gluon plasma, Binary number, Parton, Rapidity, Charm (quantum number), Nuclear Experiment, Breakup, Nuclear matter, Gluon
Abstract

Heavy quarkonia are observed to be suppressed in relativistic heavy-ion collisions relative to their production in p + p collisions scaled by the number of binary collisions. In order to determine if this suppression is related to color screening of these states in the produced medium, one needs to account for other nuclear modifications including those in cold nuclear matter. In this paper, we present new measurements from the PHENIX 2007 data set of J/psi yields at forward rapidity (1.2 < vertical bar y vertical bar < 2.2) in Au + Au collisions at root s(NN) = 200 GeV. The data confirm the earlier finding that the suppression of J/. at forward rapidity is stronger than at midrapidity, while also extending the measurement to finer bins in collision centrality and higher transverse momentum (p(T)). We compare the experimental data to the most recent theoretical calculations that incorporate a variety of physics mechanisms including gluon saturation, gluon shadowing, initial-state parton energy loss, cold nuclear matter breakup, color screening, and charm recombination. We find J/psi suppression beyond cold-nuclear-matter effects. However, the current level of disagreement between models and d + Au data precludes using these models to quantify the hot-nuclear-matter suppression.

Published
2011
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138. Suppression of Back-to-Back Hadron Pairs at Forward Rapidity ind+AuCollisions atsNN=200 GeV

Author

F. Matathias, Kensuke Homma, E. Richardson, L. Tomášek, K. I. Hahn, Y. Fukao, B. Bassalleck, Alexei Khanzadeev, M. Konno, T. Hester, A. Kiss, E. Stenlund, J. B. Choi, Henner Buesching, Steve Edwards, J. T. Mitchell, R. Seidl, Vladislav Manko, M. Slunečka, Y. Nakamiya, G. Baksay, S. Belikov, Y. J. Kim, Marcus Hohlmann, C. Vale, K. V. Dharmawardane, X. He, N. Grau, X. Jiang, H. Pei, Christine Angela Aidala, K. S. Sim, Maya Hachiya Shimomura, Y. I. Makdisi, T. Horaguchi, M. Rosati, K. Sakashita, Hongfang Liu, D. E. Fields, C. Silvestre, T. Murakami, Y. Aramaki, Martin Purschke, V. Peresedov, Robert Vertesi, B. V. Jacak, Y. Ikeda, E. J. Mannel, C. L. Woody, A. Berdnikov, Alexander Milov, T. C. Awes, Kyoichiro Ozawa, T. Liška, Marisilvia Donadelli, V. Bumazhnov, Motoi Inaba, B. Meredith, L. A. Linden Levy, R. Yang, I. Nakagawa, T. Engelmore, O. Drapier, Frank Ellinghaus, C. Pinkenburg, J. Koster, J. S. Bok, Jun Kikuchi, M. McCumber, R. M. Wright, A. Caringi, J. H. Bhom, E. R. Kinney, M. Gonin, S. Tarafdar, John Hill, Toru Sugitate, D. P. Morrison, A. Morreale, S. Campbell, R. Tanabe, S. Taneja, H. Masui, J. Jin, Jason Kamin, Mate Csanad, Jongmin Lee, D. Lynch, T. Kempel, E. M. Takagui, A. Sukhanov, Jiangyong Jia, Z. Fraenkel, Y. Goto, M. Naglis, S. Bathe, G. Roche, M. J. Tannenbaum, Y. J. Kwon, S. Sawada, J. Ying, A. Franz, T. V. Moukhanova, C. Baumann, D. Watanabe, H. Pereira, Y. Morino, D. S. Jumper, K. Imai, H. Torii, K. A. Drees, R. K. Choudhury, François Fleuret, J. Hanks, S. P. Stoll, M. D. Malik, Dmitry Blau, T. Dahms, Agneta Oskarsson, H. A. Gustafsson, Tatsuya Chujo, B. Azmoun, A. Král, Y. Onuki, E. Vznuzdaev, C. P. Singh, I. V. Sourikova, T. Ichihara, Rushan Han, M. Nihashi, B. M. Johnson, Sung Keun Park, Charles Maguire, Masayasu Ishihara, S. Dairaku, I. Tserruya, Yu. Efremenko, Minghui Liu, A. Kim, Jan Rak, S. S.E. Rosendahl, K. N. Barish, G. Bunce, Takahiro Fusayasu, Vladimir Samsonov, R. J. Petti, Eva Haslum, E. J. Desmond, Y. Berdnikov, G. Grim, K. B. Lee, N. N. Ajitanand, V. Singh, R. Lacey, S. Nam, Alexander Malakhov, Y. Akiba, D. Silvermyr, M. Oka, M. Togawa, M. Heffner, R. Granier de Cassagnac, Kenneth Francis Read, A. Adare, P. Ružička, S. Nagamiya, L. S. Zolin, W. J. Park, Christopher Rosen, M. Virius, A. Isupov, D. Kawall, H. Themann, E. Vazquez-Zambrano, M. Kasai, Tamas Ferenc Csorgo, Alice Mignerey, J. Sziklai, S. Sano, R. P. Pisani, A. Yanovich, O. Dietzsch, J. L. Nagle, E. T. Atomssa, L. D'Orazio, D. Jouan, H. Valle, Viktor Riabov, E. Kistenev, Atsushi Taketani, P. Liebing, A. Dion, Takahiro Nakamura, M. I. Nagy, S. Yokkaichi, Dipanwita Dutta, Brian Cole, S. N. White, Deepa Thomas, C. H. Chen, R. Pak, J. Murata, Y. Tsuchimoto, Y. Iwanaga, K. S. Joo, P. Lichtenwalner, M. Ouchida, K. Das, M. L. Brooks, K. Karatsu, Zvi Hirsh Citron, Johannes Peter Wessels, Julia Velkovska, A. Glenn, Susumu Oda, Takao Sakaguchi, B. Komkov, Y. J. Mao, K. Watanabe, S. Afanasiev, K. Nakano, I. Ravinovich, Anne Marie Sickles, W. E. Sondheim, N. Means, R. S. Towell, Aaron Angerami, Gerd Joachim Kunde, Eunja Kim, I. E. Yushmanov, B. Love, A. D. Frawley, D. Ivanischev, A. Durum, D. Roach, P. A. Rukoyatkin, I. Garishvili, M. Bai, I. Shein, N. Apadula, Jen-Chieh Peng, P. L. McGaughey, Beomkyu Kim, K. Boyle, Vaclav Vrba, Norio Saito, Tsutomu Mibe, Klaus Johannes Reygers, J. Newby, Kazuyoshi Kurita, F. Wei, W. A. Zajc, M. K. Dayananda, K. M. Kijima, S. Huang, J. H. Kang, K. Shoji, J. S. Haggerty, M. A. L. Leite, C. Oakley, A. G. Litvinenko, A. Drees, V. Baublis, A. Denisov, V. Cianciolo, K. Sedgwick, Inkyu Park, Rui Wei, W. Holzmann, K. Yamaura, V. S. Pantuev, Sergey Fokin, Zhiying You, M. Wysocki, S. Esumi, A. Deshpande, Xiong Wang, D. Sharma, Z. Conesa del Valle, Dong Jo Kim, P. W. Stankus, G. R. Young, R. Bennett, M. Kawashima, R. Ichimiya, Y. Tanaka, T. L. Thomas, M. Finger, A. Veicht, R. Seto, D. Hornback, M. Chiu, R. Belmont, J. S. Kapustinsky, Xingguo Li, J. E. Frantz, Ryugo S. Hayano, V. Babintsev, J. Hamblen, Y. S. Lai, C. A. Ogilvie, C. Y. Chi, Y. Watanabe, G. S. Kyle, I. Danchev, Kisung Lee, T. K. Hemmick, Y. Riabov, Kenta Shigaki, I. Younus, Prashant Shukla, J. M. Durham, H. J. Moon, L. Baksay, Yasuo Miake, S. P. Sorensen, M. Nguyen, K. Fujiwara, H. Qu, James Alexander, K. Okada, A. S. Nyanin, S. F. Pate, R. Averbeck, A. Taranenko, Hideki Hamagaki, K. Aoki, Byung-Sik Hong, A. Bazilevsky, L. Kochenda, M. Issah, Rachid Nouicer, O. Chvala, M. Proissl, B. Sahlmueller, G. David, Y. L. Yamaguchi, Kazushi Miki, H. En'yo, Alexandre Lebedev, M. J. Leitch, D. M. Lee, Ke. Nakamura, J. G. Lajoie, Brajesh K. Singh, H. Al-Bataineh, I. J. Choi, A. Kravitz, H. W. Van Hecke, V. Papavassiliou, R. A. Soltz, M. Grosse Perdekamp, M. E. Connors, K. Tanida, T. Jones, Peter Christiansen, D. Winter, D. Yu Peressounko, Senta Greene, A. T. Basye, B. Fadem, E. O'Brien, Ajit Kumar Mohanty, T. A. Shibata, C. L. Silva, T. Sato, D. Isenhower, A. Toia, M. Kurosawa, A. Enokizono, P. Chung, A. Datta, Taku Gunji, H. Gong, J. Seele, F. Kajihara, S. Butsyk, S. Zhou, S. D. Rolnick, and A. V. Kazantsev

Subjects
Physics, Particle physics, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Nuclear Theory, Hadron, General Physics and Astronomy, Parton, 7. Clean energy, 01 natural sciences, Gluon, Nuclear physics, Pseudorapidity, 0103 physical sciences, High Energy Physics::Experiment, Rapidity, Impact parameter, Nuclear Experiment, 010306 general physics, Nucleon, Relativistic Heavy Ion Collider
Abstract

Back-to-back hadron pair yields in d + Au and p + p collisions at root S-NN = 200 GeV were measured with the PHENIX detector at the Relativistic Heavy Ion Collider. Rapidity separated hadron pairs were detected with the trigger hadron at pseudorapidity vertical bar eta vertical bar < 0: 35 and the associated hadron at forward rapidity (deuteron direction, 3.0< eta < 3.8). Pairs were also detected with both hadrons measured at forward rapidity; in this case, the yield of back-to-back hadron pairs in d + Au collisions with small impact parameters is observed to be suppressed by a factor of 10 relative to p + p collisions. The kinematics of these pairs is expected to probe partons in the Au nucleus with a low fraction x of the nucleon momenta, where the gluon densities rise sharply. The observed suppression as a function of nuclear thickness, p(T), and eta points to cold nuclear matter effects arising at high parton densities.

Published
2011
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139. Heavy-quark production inp+pand energy loss and flow of heavy quarks in Au + Au collisions atsNN=200GeV

Author

S. Y. Fung, M. Chiu, Maya Hachiya Shimomura, T. A. Shibata, Y. I. Makdisi, Z. Fraenkel, Steven E. Skutnik, S. Bathe, John Hill, Agneta Oskarsson, V. S. Pantuev, H. A. Torii, Toru Sugitate, L. D. Isenhower, Y. Berdnikov, Y. Akiba, M. Harvey, M. J. Tannenbaum, J. T. Mitchell, R. Seidl, Vladislav Manko, M. Slunečka, D. Isenhower, A. Toia, L. Mašek, M. Mishra, S. Nagamiya, Kazuhiro Tanaka, Vaclav Vrba, Klaus Johannes Reygers, H. Qu, C. Vale, Junji Tojo, B. S. Chang, Christine Angela Aidala, J. Klay, D. Mukhopadhyay, S. Rembeczki, M. Rosati, François Fleuret, D. Bucher, B. Forestier, I. Ravinovich, Y. Nagata, J. Gosset, J. P. Sullivan, R. Vértesi, K. Okada, B. Sahlmueller, H. En'yo, P. Constantin, Saskia Mioduszewski, S. N. White, S. F. Pate, Anne Marie Sickles, S. Kelly, Hideki Hamagaki, K. Aoki, G. David, F. Matathias, S. S. Ryu, M. J. Leitch, M. Gonin, J. Chiba, N. N. Ajitanand, Mate Csanad, P. Tarján, A. A. Vinogradov, Henrik Tydesjö, K. Nakano, Kensuke Homma, S. Chernichenko, H. Lim, B. Bassalleck, M. Konno, Y. Nakamiya, G. C. Mishra, G. Baksay, M. T. Bjorndal, R. Bennett, Ahmed Al-Jamel, M. Finger, Y. L. Yamaguchi, B. Komkov, Takao Sakaguchi, H. Al-Bataineh, W. E. Sondheim, Norio Saito, Takahiro Nakamura, M. A. L. Leite, C. Klein-Boesing, K. Dehmelt, A. Kiss, D. Kawall, C. L. Woody, Z. Yasin, Henner Buesching, Jiangyong Jia, Y. Goto, O. Zaudtke, A. D. Frawley, T. Tabaru, Jen-Chieh Peng, S. Yokkaichi, P. A. Rukoyatkin, H. Pei, G. R. Young, J. M. Burward-Hoy, H. Pereira, V. I. Kochetkov, Alexei Khanzadeev, J. M. Heuser, T. Ichihara, Osamu Jinnouchi, S. H. Aronson, J. Jin, E. M. Takagui, Marcus Hohlmann, M. Virius, W. Holzmann, C. P. Singh, B. M. Johnson, J. Murata, B. Azmoun, A. Král, M. J. Kweon, Y. Le Bornec, Gerd Joachim Kunde, Matthew G. Reuter, Takahiro Fusayasu, I. D. Ojha, Alexander Malakhov, Susumu Oda, T. Shohjoh, A. Durum, W. C. Smith, V. Babintsev, K. O. Eyser, K. Fujiwara, C. R. Cleven, C. Haegemann, Y. Inoue, Y. Cobigo, D. Silvermyr, V. Papavassiliou, Sébastien Gadrat, A. Isupov, C. Suire, I. Shein, D. S. Brown, Jan Rak, Xiong Wang, J. G. Boissevain, I. V. Sourikova, Masashi Kaneta, R. Pak, N. Kamihara, X. He, O. O. Omiwade, V. Peresedov, Dong Jo Kim, E. Stenlund, H. Sakata, M. K. Lee, E. H. Kim, L. S. Zolin, David D'Enterria, P. J. Kroon, Dong-Hun Kim, P. D. Barnes, J. E. Frantz, Hiroaki Ohnishi, R. Lacey, J. Sziklai, W. J. Park, Alberto Baldisseri, R. Armendariz, C. Pinkenburg, A. Yanovich, M. Oka, S. K. Tuli, R. Granier de Cassagnac, Herve Borel, D. Lynch, A. Adare, M. Naglis, Senta Greene, D. E. Fields, K. Hasuko, B. V. Jacak, Brian Cole, R. P. Pisani, C. L. Silva, R. S. Towell, M. Stepanov, G. Roche, Kazuyoshi Kurita, H. Masui, A. K. Dubey, A. Glenn, O. Dietzsch, E. T. Atomssa, Masayasu Ishihara, Y. J. Mao, S. Kametani, A. Dion, Susumu Sato, I. Garishvili, Akio Kiyomichi, M. Mitrovski, A. Deshpande, M. McCumber, A. K. Purwar, H. Valle, Alexander Milov, I. Nakagawa, H. W. Van Hecke, V. L. Rykov, T. Dahms, A. A. Bickley, A. Drees, N. Grau, J. H. Kang, J. S. Haggerty, T. V. Moukhanova, K. Shoji, J. Kubart, O. Drapier, Frank Ellinghaus, B. E. Norman, Xiao-yan Li, N. Kurihara, S. Takagi, M. Ouchida, Nikolay Tyurin, Y. Watanabe, Atsushi Taketani, K. N. Barish, E. R. Kinney, I. Younus, D. P. Morrison, S. Campbell, E. O'Brien, R. A. Soltz, Julia Velkovska, P. W. Stankus, A. Soldatov, J. Asai, A. Enokizono, M. Wysocki, V. E. Semenov, M. B. Deaton, E. J. Desmond, M. N. Wagner, Y. Fukao, G. S. Kyle, A. Shevel, M. Grosse Perdekamp, Y. Tanaka, N. Willis, James Alexander, K. S. Sim, Tatsuya Chujo, Y. S. Lai, I. Tserruya, M. G. Hur, C. Y. Chi, Tae-Yeon Lee, J. Egdemir, M. Togawa, Yu. Efremenko, V. Singh, T. K. Shea, R. Averbeck, Martin Purschke, T. Hester, Robert F. Hobbs, Byung-Sik Hong, A. Bazilevsky, Y. Kwon, Joakim Nystrand, J. Park, M. L. Brooks, Florian Bauer, Philippe Rosnet, Jason Kamin, F. Gastineau, H. Hiejima, B. Love, Alexandre Lebedev, F. Staley, L. Baksay, K. Das, D. Winter, Charles Maguire, S. Leckey, D. Yu Peressounko, D. M. Lee, Marie Germain, S. P. Stoll, Eva Haslum, B. Lenzi, Shingo Sakai, Josh Moss, Kiyoshi Tanida, Xingguo Li, Debashish Pal, Y. Tsuchimoto, J. L. Drachenberg, S. Sawada, E. P. Hartouni, A. G. Litvinenko, K. Imai, E. Kistenev, Hirohiko Sato, J. Ying, A. Franz, T. L. Thomas, H. Harada, S. S.E. Rosendahl, G. Bunce, D. Kotchetkov, A. Kozlov, R. Seto, S. P. Sorensen, K. Haruna, Dylan Walker, B. Espagnon, V. Dzhordzhadze, S. Afanasiev, A. Morreale, V-N. Tram, I. E. Yushmanov, J. G. Lajoie, A. Churyn, D. Jouan, A. Ster, T. Hachiya, Motoi Inaba, I. J. Choi, A. Kravitz, Ryugo S. Hayano, A. Romana, J. Newby, K. S. Joo, Y. Riabov, Kenta Shigaki, C. A. Ogilvie, T. K. Hemmick, D. Hornback, M. Nguyen, A. Taranenko, Yasuo Miake, Kazushi Miki, S. Esumi, D. Sharma, A. S. Nyanin, L. Kochenda, Rachid Nouicer, T. Kawagishi, S. Belikov, L. Aphecetche, Minghui Liu, M. Heffner, C. Silvestre, Kenneth Francis Read, A. V. Kazantsev, Marisilvia Donadelli, V. Bumazhnov, M. P. Comets, L. Tomášek, P. Mikeš, Andry Malala Rakotozafindrabe, T. C. Awes, Kyoichiro Ozawa, T. Liška, Jun Kikuchi, Johannes Peter Wessels, Tadaaki Isobe, J. S. Chai, P. L. McGaughey, Rushan Han, M. N. Hagiwara, M. Issah, C. Zhang, J. Zimányi, S. Butsyk, Vladimir Samsonov, M. D. Malik, I. Otterlund, E. Vznuzdaev, Viktor Riabov, W. A. Zajc, Tamas Ferenc Csorgo, V. Baublis, A. Hadj Henni, J. L. Nagle, A. Denisov, V. Cianciolo, Sergey Fokin, T. Horaguchi, K. Boyle, H. Å Gustafsson, Wei Xie, S. Batsouli, H. Iinuma, M. C. McCain, A. P.T. Palounek, H. Kanou, Taku Gunji, H. Gong, J. Seele, F. Kajihara, H. Delagrange, S. Zhou, Y. S. Kim, J. L. Charvet, T. E. Miller, P. Chung, M. Holmes, and W. S. Emam

Subjects
Quark, Physics, Nuclear and High Energy Physics, Particle physics, Range (particle radiation), Meson, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Electron, 01 natural sciences, 7. Clean energy, Spectral line, Nuclear physics, Flow (mathematics), 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Anisotropy, Relativistic Heavy Ion Collider
Abstract

Transverse momentum spectra of electrons (p(T)(e)) from semileptonic weak decays of heavy-flavor mesons in the range of 0.3 < p(T)(e) < 9.0 GeV/c have been measured at midrapidity (|y| < 0.35) by the PHENIX experiment at the Relativistic Heavy Ion Collider in p + p and Au + Au collisions at root s(NN) = 200 GeV. In addition, the azimuthal anisotropy parameter v(2) has been measured for 0.3 < p(T)(e) < 5.0 GeV/c in Au + Au collisions. The substantial modification in the p(T)(e) spectra in Au + Au compared with p + p collisions as well as the nonzero v(2) indicate substantial interactions and flow of heavy quarks in traversing the produced medium. Comparisons of these observables with detailed theoretical calculations can be used to identify the nature of these interactions and to quantify their extent.

Published
2011
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140. Cold Nuclear Matter Effects onJ/ψYields as a Function of Rapidity and Nuclear Geometry ind+ACollisions atsNN=200 GeV

Author

T. L. Thomas, V. S. Pantuev, K. S. Joo, Ryugo S. Hayano, S. Afanasiev, M. K. Dayananda, E. H. Kim, X. Jiang, J. Hamblen, A. Ster, Y. Riabov, M. Wysocki, Kenta Shigaki, N. Apadula, I. Tserruya, Yu. Efremenko, J. Newby, M. Nguyen, Tadaaki Isobe, K. Okada, B. Sahlmueller, A. Vossen, Y. Nakamiya, V. Singh, A. S. Nyanin, Dmitry Blau, Jongmin Lee, Y. Fukao, H. En'yo, P. Tarján, M. J. Leitch, Rachid Nouicer, M. Proissl, S. Esumi, O. Dietzsch, D. Sharma, P. L. McGaughey, Charles Maguire, T. Hester, K. A. Drees, C. M. Camacho, E. J. Desmond, R. Ichimiya, K. Das, E. P. Hartouni, E. T. Atomssa, H. Valle, H. A. Gustafsson, D. Hornback, G. Baksay, D. Lynch, Prashant Shukla, T. Kempel, Dong-Hun Kim, M. Chiu, S. F. Pate, M. Togawa, E. Vazquez-Zambrano, A. Glenn, Ke. Nakamura, S. N. White, Dipanwita Dutta, C. Zhang, G. S. Kyle, Deepa Thomas, P. Ružička, R. Pak, Kiyoshi Tanida, Marisilvia Donadelli, V. Bumazhnov, J. Park, Andry Malala Rakotozafindrabe, D. S. Jumper, A. Yu. Semenov, V. L. Rykov, T. Dahms, H. Al-Bataineh, B. Azmoun, A. Král, M. J. Kweon, A. Taranenko, James Alexander, Eunja Kim, Julia Velkovska, E. Kistenev, C. L. Woody, A. Berdnikov, J. Gosset, N. Kamihara, M. Gonin, Zvi Hirsh Citron, K. Nakano, Viktor Riabov, K. Watanabe, Y. Tsuchimoto, R. Tanabe, Y. Iwanaga, R. Averbeck, Byung-Sik Hong, A. Bazilevsky, I. Ravinovich, K. Shoji, I. E. Yushmanov, Kazushi Miki, T. Horaguchi, W. E. Sondheim, D. Ivanischev, Minghui Liu, P. Lichtenwalner, M. Rosati, A. Caringi, Y. J. Kim, Jen-Chieh Peng, Kazuyoshi Kurita, V-N. Tram, N. Grau, Senta Greene, Taku Gunji, H. Gong, C. Oakley, A. Drees, J. Seele, M. Oka, D. Layton, P. A. Rukoyatkin, L. Aphecetche, V. Papavassiliou, Hongfang Liu, D. E. Fields, K. O. Eyser, A. K. Purwar, A. T. Basye, M. Heffner, Kenneth Francis Read, A. Sukhanov, H. Pereira, K. V. Dharmawardane, B. V. Jacak, M. Bai, Philippe Rosnet, P. W. Stankus, Brajesh K. Singh, T. Murakami, K. Fujiwara, T. Ichihara, Alexandre Lebedev, Y. Morino, Inkyu Park, B. Fadem, E. O'Brien, Takahiro Fusayasu, W. C. Chang, Xiong Wang, A. A. Vinogradov, Atsushi Taketani, Y. L. Yamaguchi, R. A. Soltz, H. Borel, J. T. Mitchell, Motoi Inaba, R. M. Wright, Alexei Khanzadeev, I. V. Sourikova, M. McCumber, F. Kajihara, S. Yokkaichi, P. Liebing, Tae-Yeon Lee, Martin Purschke, Z. Conesa del Valle, Jiangyong Jia, Y. Goto, Y. Tanaka, Alexander Malakhov, Dong Jo Kim, E. Stenlund, G. Grim, M. Grosse Perdekamp, D. M. Lee, D. Silvermyr, A. Dion, C. A. Ogilvie, H. Iinuma, Rushan Han, K. Karatsu, M. Kasai, A. P.T. Palounek, M. E. Connors, R. Seidl, Vladislav Manko, M. Slunečka, Zhiying You, K. B. Lee, A. V. Kazantsev, S. Sawada, R. Bennett, J. B. Choi, J. Ying, A. Franz, Johannes Peter Wessels, L. S. Zolin, M. Kawashima, Kisung Lee, Mate Csanad, A. Veicht, W. J. Park, Anne Marie Sickles, Y. Ikeda, T. K. Hemmick, J. G. Boissevain, E. J. Mannel, Christopher Rosen, K. Kiriluk, J. M. Durham, Yasuo Miake, P. D. Barnes, A. Yanovich, Aaron Angerami, J. Hanks, M. Ouchida, S. Belikov, M. Finger, S. Dairaku, W. A. Zajc, L. Tomášek, Sung Keun Park, Vladimir Samsonov, J. H. Bhom, S. Butsyk, N. Means, J. Asai, S. Tarafdar, A. Morreale, Z. Fraenkel, H. J. Moon, L. Baksay, T. Jones, N. N. Ajitanand, L. Kochenda, M. Issah, O. Zaudtke, M. Nihashi, B. Meredith, B. Komkov, V. Baublis, H. W. Van Hecke, A. Denisov, Peter Christiansen, V. Cianciolo, Alexander Milov, I. Nakagawa, T. Engelmore, Y. Tomita, T. V. Moukhanova, Sergey Fokin, D. Roach, K. M. Kijima, C. Vale, H. Qu, Shingo Sakai, M. I. Nagy, T. C. Awes, Kyoichiro Ozawa, T. Liška, H. Pei, R. Vértesi, R. K. Choudhury, David D'Enterria, C. Pinkenburg, D. Winter, Eva Haslum, D. Yu Peressounko, K. Sakashita, Norio Saito, John Hill, B. Lenzi, M. Virius, S. Zhou, Takahiro Nakamura, D. Watanabe, G. R. Young, B. S. Chang, Christine Angela Aidala, J. Klay, J. S. Bok, Jun Kikuchi, D. McGlinchey, Hideki Hamagaki, K. Aoki, A. Baldisseri, O. Drapier, Frank Ellinghaus, Tamas Ferenc Csorgo, G. David, J. L. Nagle, Toru Sugitate, M. D. Malik, Xingguo Li, M. Stepanov, G. Roche, E. R. Kinney, Y. J. Mao, R. P. Pisani, Jason Kamin, A. Kiss, Tsutomu Mibe, M. A. L. Leite, C. H. Chen, Y. Onuki, E. Vznuzdaev, Susumu Oda, Henner Buesching, Steve Edwards, S. P. Stoll, S. D. Rolnick, F. Matathias, A. Durum, J. E. Frantz, S. P. Sorensen, J. H. Kang, J. S. Haggerty, Jan Rak, O. Chvala, S. S.E. Rosendahl, R. Lacey, Kensuke Homma, E. Richardson, François Fleuret, G. Bunce, D. P. Morrison, R. Granier de Cassagnac, S. Campbell, J. L. Charvet, P. Constantin, Catherine Micaela Silvestre, Seong H. Kim, A. Hadj Henni, A. Adare, Marcus Hohlmann, K. Yamaura, J. G. Lajoie, A. Churyn, S. Chernichenko, V. E. Semenov, K. I. Hahn, B. Bassalleck, L. A. Linden Levy, P. Mikeš, D. Jouan, Beomkyu Kim, K. Boyle, Wei Xie, I. J. Choi, A. Kravitz, R. Belmont, M. Kurosawa, J. S. Kapustinsky, M. Konno, V. Babintsev, Y. S. Lai, S. Bathe, A. Enokizono, K. S. Sim, V. Dzhordzhadze, Agneta Oskarsson, Y. Kwon, Y. Berdnikov, Y. Akiba, R. Yang, M. Mishra, S. Nagamiya, P. Chung, S. Taneja, J. Imrek, Vaclav Vrba, Klaus Johannes Reygers, Tatsuya Chujo, Rui Wei, K. Imai, A. Datta, Ajit Kumar Mohanty, T. A. Shibata, C. L. Silva, T. Sato, D. Isenhower, A. Toia, L. Mašek, T. Niita, R. S. Towell, I. Garishvili, F. Wei, C. Y. Chi, J. Jin, E. M. Takagui, C. Baumann, S. Kametani, C. P. Singh, B. M. Johnson, R. J. Petti, A. Isupov, C. Suire, J. Sziklai, Brian Cole, K. N. Barish, S. Nam, S. Sano, M. L. Brooks, B. Love, A. G. Litvinenko, A. Kozlov, R. Seto, K. Haruna, I. Danchev, X. He, Y. Aramaki, V. Peresedov, J. Koster, S. Batsouli, H. Masui, A. K. Dubey, A. A. Bickley, A. Deshpande, Y. Watanabe, I. Younus, A. Soldatov, M. Naglis, Masayasu Ishihara, F. Staley, D. Kawall, H. Themann, J. Murata, Gerd Joachim Kunde, I. Shein, K. Sedgwick, Maya Hachiya Shimomura, Y. I. Makdisi, M. J. Tannenbaum, H. Torii, A. Kim, D. Mukhopadhyay, S. Rembeczki, Alice Mignerey, L. D'Orazio, Takao Sakaguchi, C. Klein-Boesing, A. D. Frawley, S. Huang, and W. Holzmann

Subjects
Physics, Particle physics, Meson, 010308 nuclear & particles physics, Nuclear Theory, Hadron, General Physics and Astronomy, Elementary particle, Quarkonium, Nuclear matter, 7. Clean energy, 01 natural sciences, Gluon, Nuclear physics, 0103 physical sciences, Bound state, Rapidity, Nuclear Experiment, 010306 general physics
Abstract

We present measurements of J/psi yields in d + Au collisions at root S-NN = 200 GeV recorded by the PHENIX experiment and compare them with yields in p + p collisions at the same energy per nucleon-nucleon collision. The measurements cover a large kinematic range in J/psi rapidity (-2.2 < y < 2.4) with high statistical precision and are compared with two theoretical models: one with nuclear shadowing combined with final state breakup and one with coherent gluon saturation effects. In order to remove model dependent systematic uncertainties we also compare the data to a simple geometric model. The forward rapidity data are inconsistent with nuclear modifications that are linear or exponential in the density weighted longitudinal thickness, such as those from the final state breakup of the bound state.

Published
2011
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141. Observation of direct-photon collective flow in Au + Au collisions at √s(NN)] = 200 GeV

Author

A, Adare, S, Afanasiev, C, Aidala, N N, Ajitanand, Y, Akiba, H, Al-Bataineh, J, Alexander, K, Aoki, Y, Aramaki, E T, Atomssa, R, Averbeck, T C, Awes, B, Azmoun, V, Babintsev, M, Bai, G, Baksay, L, Baksay, K N, Barish, B, Bassalleck, A T, Basye, S, Bathe, V, Baublis, C, Baumann, A, Bazilevsky, S, Belikov, R, Belmont, R, Bennett, A, Berdnikov, Y, Berdnikov, A A, Bickley, J S, Bok, K, Boyle, M L, Brooks, H, Buesching, V, Bumazhnov, G, Bunce, S, Butsyk, C M, Camacho, S, Campbell, C-H, Chen, C Y, Chi, M, Chiu, I J, Choi, R K, Choudhury, P, Christiansen, T, Chujo, P, Chung, O, Chvala, V, Cianciolo, Z, Citron, B A, Cole, M, Connors, P, Constantin, M, Csanád, T, Csörgő, T, Dahms, S, Dairaku, I, Danchev, K, Das, A, Datta, G, David, A, Denisov, A, Deshpande, E J, Desmond, O, Dietzsch, A, Dion, M, Donadelli, O, Drapier, A, Drees, K A, Drees, J M, Durham, A, Durum, D, Dutta, S, Edwards, Y V, Efremenko, F, Ellinghaus, T, Engelmore, A, Enokizono, H, En'yo, S, Esumi, B, Fadem, D E, Fields, M, Finger, F, Fleuret, S L, Fokin, Z, Fraenkel, J E, Frantz, A, Franz, A D, Frawley, K, Fujiwara, Y, Fukao, T, Fusayasu, I, Garishvili, A, Glenn, H, Gong, M, Gonin, Y, Goto, R, Granier de Cassagnac, N, Grau, S V, Greene, M, Grosse Perdekamp, T, Gunji, H-Å, Gustafsson, J S, Haggerty, K I, Hahn, H, Hamagaki, J, Hamblen, R, Han, J, Hanks, E P, Hartouni, E, Haslum, R, Hayano, X, He, M, Heffner, T K, Hemmick, T, Hester, J C, Hill, M, Hohlmann, W, Holzmann, K, Homma, B, Hong, T, Horaguchi, D, Hornback, S, Huang, T, Ichihara, R, Ichimiya, J, Ide, Y, Ikeda, K, Imai, M, Inaba, D, Isenhower, M, Ishihara, T, Isobe, M, Issah, A, Isupov, D, Ivanischev, B V, Jacak, J, Jia, J, Jin, B M, Johnson, K S, Joo, D, Jouan, D S, Jumper, F, Kajihara, S, Kametani, N, Kamihara, J, Kamin, J H, Kang, J, Kapustinsky, K, Karatsu, D, Kawall, M, Kawashima, A V, Kazantsev, T, Kempel, A, Khanzadeev, K M, Kijima, B I, Kim, D H, Kim, D J, Kim, E, Kim, E J, Kim, S H, Kim, Y J, Kim, E, Kinney, K, Kiriluk, A, Kiss, E, Kistenev, C, Klein-Boesing, L, Kochenda, B, Komkov, M, Konno, J, Koster, D, Kotchetkov, A, Kozlov, A, Král, A, Kravitz, G J, Kunde, K, Kurita, M, Kurosawa, Y, Kwon, G S, Kyle, R, Lacey, Y S, Lai, J G, Lajoie, A, Lebedev, D M, Lee, J, Lee, K, Lee, K B, Lee, K S, Lee, M J, Leitch, M A L, Leite, E, Leitner, B, Lenzi, X, Li, P, Liebing, L A, Linden Levy, T, Liška, A, Litvinenko, H, Liu, M X, Liu, B, Love, R, Luechtenborg, D, Lynch, C F, Maguire, Y I, Makdisi, A, Malakhov, M D, Malik, V I, Manko, E, Mannel, Y, Mao, H, Masui, F, Matathias, M, McCumber, P L, McGaughey, N, Means, B, Meredith, Y, Miake, A C, Mignerey, P, Mikeš, K, Miki, A, Milov, M, Mishra, J T, Mitchell, A K, Mohanty, Y, Morino, A, Morreale, D P, Morrison, T V, Moukhanova, J, Murata, S, Nagamiya, J L, Nagle, M, Naglis, M I, Nagy, I, Nakagawa, Y, Nakamiya, T, Nakamura, K, Nakano, J, Newby, M, Nguyen, R, Nouicer, A S, Nyanin, E, O'Brien, S X, Oda, C A, Ogilvie, M, Oka, K, Okada, Y, Onuki, A, Oskarsson, M, Ouchida, K, Ozawa, R, Pak, V, Pantuev, V, Papavassiliou, I H, Park, J, Park, S K, Park, W J, Park, S F, Pate, H, Pei, J-C, Peng, H, Pereira, V, Peresedov, D Yu, Peressounko, C, Pinkenburg, R P, Pisani, M, Proissl, M L, Purschke, A K, Purwar, H, Qu, J, Rak, A, Rakotozafindrabe, I, Ravinovich, K F, Read, K, Reygers, V, Riabov, Y, Riabov, E, Richardson, D, Roach, G, Roche, S D, Rolnick, M, Rosati, C A, Rosen, S S E, Rosendahl, P, Rosnet, P, Rukoyatkin, P, Ružička, B, Sahlmueller, N, Saito, T, Sakaguchi, K, Sakashita, V, Samsonov, S, Sano, T, Sato, S, Sawada, K, Sedgwick, J, Seele, R, Seidl, A Yu, Semenov, R, Seto, D, Sharma, I, Shein, T-A, Shibata, K, Shigaki, M, Shimomura, K, Shoji, P, Shukla, A, Sickles, C L, Silva, D, Silvermyr, C, Silvestre, K S, Sim, B K, Singh, C P, Singh, V, Singh, M, Slunečka, R A, Soltz, W E, Sondheim, S P, Sorensen, I V, Sourikova, N A, Sparks, P W, Stankus, E, Stenlund, S P, Stoll, T, Sugitate, A, Sukhanov, J, Sziklai, E M, Takagui, A, Taketani, R, Tanabe, Y, Tanaka, K, Tanida, M J, Tannenbaum, S, Tarafdar, A, Taranenko, P, Tarján, H, Themann, T L, Thomas, M, Togawa, A, Toia, L, Tomášek, H, Torii, R S, Towell, I, Tserruya, Y, Tsuchimoto, C, Vale, H, Valle, H W, van Hecke, E, Vazquez-Zambrano, A, Veicht, J, Velkovska, R, Vértesi, A A, Vinogradov, M, Virius, V, Vrba, E, Vznuzdaev, X R, Wang, D, Watanabe, K, Watanabe, Y, Watanabe, F, Wei, R, Wei, J, Wessels, S N, White, D, Winter, J P, Wood, C L, Woody, R M, Wright, M, Wysocki, W, Xie, Y L, Yamaguchi, K, Yamaura, R, Yang, A, Yanovich, J, Ying, S, Yokkaichi, Z, You, G R, Young, I, Younus, I E, Yushmanov, W A, Zajc, C, Zhang, S, Zhou, and L, Zolin

Abstract

The second Fourier component v(2) of the azimuthal anisotropy with respect to the reaction plane is measured for direct photons at midrapidity and transverse momentum (p(T)) of 1-12 GeV/c in Au + Au collisions at √s(NN)] = 200 GeV. Previous measurements of this quantity for hadrons with p(T)6 GeV/c indicate that the medium behaves like a nearly perfect fluid, while for p(T)6 GeV/c a reduced anisotropy is interpreted in terms of a path-length dependence for parton energy loss. In this measurement with the PHENIX detector at the Relativistic Heavy Ion Collider we find that for p(T)4 GeV/c the anisotropy for direct photons is consistent with zero, which is as expected if the dominant source of direct photons is initial hard scattering. However, in the p(T)4 GeV/c region dominated by thermal photons, we find a substantial direct-photon v(2) comparable to that of hadrons, whereas model calculations for thermal photons in this kinematic region underpredict the observed v(2).

Published
2011

142. Suppression of away-side jet fragments with respect to the reaction plane in Au + Au collisions atsNN=200GeV

Author

K. Karatsu, P. Tarján, Anne Marie Sickles, Y. Fukao, T. Kempel, Dong-Hun Kim, G. R. Young, S. Sawada, Senta Greene, J. Ying, A. Franz, T. Hester, A. T. Basye, B. Azmoun, A. Král, M. J. Kweon, B. Fadem, E. O'Brien, N. A. Sparks, R. S. Towell, S. P. Sorensen, Jen-Chieh Peng, I. Garishvili, V-N. Tram, N. Grau, F. Wei, O. Chvala, Marisilvia Donadelli, V. Bumazhnov, M. Oka, M. I. Nagy, D. Watanabe, Charles Maguire, A. Dion, Andry Malala Rakotozafindrabe, Seong H. Kim, J. G. Lajoie, S. Dairaku, Atsushi Taketani, A. Enokizono, P. Liebing, Kyeongpil Lee, J. Ide, Motoi Inaba, R. M. Wright, M. D. Malik, E. Vznuzdaev, B. Meredith, R. Tanabe, D. Layton, R. A. Soltz, H. Borel, Kiyoshi Tanida, I. J. Choi, A. Kravitz, Hongfang Liu, Inkyu Park, D. E. Fields, M. Grosse Perdekamp, B. V. Jacak, Xiong Wang, M. Gonin, E. Kistenev, M. E. Connors, Dong Jo Kim, C. Y. Chi, C. M. Camacho, Prashant Shukla, John Hill, S. F. Pate, H. Al-Bataineh, M. McCumber, V. Papavassiliou, E. H. Kim, M. Rosati, X. He, K. S. Joo, Toru Sugitate, K. S. Sim, V. Dzhordzhadze, A. Sukhanov, W. C. Chang, K. A. Drees, M. Wysocki, O. Zaudtke, Y. Kwon, H. Pei, Maya Hachiya Shimomura, A. Veicht, K. Sakashita, H. Pereira, Y. Morino, A. Hadj Henni, J. Hanks, R. Yang, H. Qu, Peter Christiansen, Y. Ikeda, Y. Aramaki, D. Winter, D. Yu Peressounko, Mate Csanad, Y. I. Makdisi, I. Tserruya, Beomkyu Kim, K. Boyle, Yu. Efremenko, Wei Xie, Sung Keun Park, Rushan Han, K. Imai, V. Peresedov, V. Singh, Hideki Hamagaki, K. Aoki, J. G. Boissevain, E. J. Mannel, G. David, S. Esumi, D. Sharma, Minghui Liu, N. N. Ajitanand, R. Ichimiya, François Fleuret, J. Koster, Tae-Yeon Lee, Martin Purschke, M. Virius, Takahiro Nakamura, M. Naglis, Y. Onuki, David D'Enterria, K. Watanabe, L. Aphecetche, M. J. Tannenbaum, M. Heffner, K. B. Lee, Vladimir Samsonov, S. Batsouli, K. Shoji, Jan Rak, Jason Kamin, R. Lacey, T. Ichihara, H. Torii, R. P. Pisani, R. Granier de Cassagnac, A. Adare, Susumu Oda, H. Masui, A. K. Dubey, J. Jin, C. L. Silva, Kenneth Francis Read, A. A. Bickley, P. W. Stankus, E. M. Takagui, A. Durum, A. A. Vinogradov, D. Mukhopadhyay, S. Rembeczki, A. Morreale, Johannes Peter Wessels, S. P. Stoll, Takahiro Fusayasu, Z. Fraenkel, J. L. Charvet, C. Pinkenburg, B. Love, Catherine Micaela Silvestre, C. H. Chen, Eunja Kim, C. Baumann, S. Kametani, K. Yamaura, D. Roach, J. P. Wood, K. M. Kijima, R. K. Choudhury, Y. Tanaka, Jiangyong Jia, Y. Goto, Alexander Malakhov, K. Das, C. P. Singh, Alice Mignerey, B. M. Johnson, A. Glenn, A. G. Litvinenko, E. P. Hartouni, D. Silvermyr, S. S.E. Rosendahl, G. Bunce, Tamas Ferenc Csorgo, Masayasu Ishihara, I. Ravinovich, Alexander Milov, I. Nakagawa, R. Luechtenborg, Xingguo Li, L. Baksay, A. Isupov, C. Suire, M. Kurosawa, Takao Sakaguchi, M. Stepanov, G. Roche, L. S. Zolin, C. Klein-Boesing, Y. J. Mao, J. L. Nagle, W. J. Park, Christopher Rosen, A. Kozlov, J. Sziklai, A. D. Frawley, R. Seto, Tadaaki Isobe, K. Haruna, M. Bai, A. Churyn, T. Engelmore, S. Huang, P. D. Barnes, Brian Cole, A. Yanovich, O. Drapier, Frank Ellinghaus, I. Danchev, W. Holzmann, J. H. Kang, S. Tarafdar, S. N. White, O. Dietzsch, J. S. Haggerty, D. Jouan, Zhiying You, R. Bennett, E. T. Atomssa, H. Valle, M. Kawashima, Dipanwita Dutta, E. R. Kinney, K. N. Barish, Julia Velkovska, M. Finger, D. P. Morrison, S. Campbell, P. Chung, Zvi Hirsh Citron, K. Nakano, W. E. Sondheim, D. Ivanischev, Jongmin Lee, P. A. Rukoyatkin, D. Lynch, F. Staley, J. Imrek, D. S. Jumper, V. L. Rykov, T. Dahms, V. E. Semenov, Y. S. Lai, S. Sano, B. Komkov, C. A. Ogilvie, Tatsuya Chujo, D. Kawall, Kisung Lee, T. K. Hemmick, A. Datta, H. Themann, J. M. Durham, M. L. Brooks, Yasuo Miake, Taku Gunji, H. Gong, J. Seele, P. L. McGaughey, Norio Saito, Eva Haslum, B. Lenzi, F. Kajihara, L. Kochenda, M. Issah, J. Murata, M. A. L. Leite, S. Afanasiev, A. Ster, S. Butsyk, M. Chiu, Gerd Joachim Kunde, I. Shein, J. Newby, R. Pak, S. Zhou, A. Baldisseri, S. D. Rolnick, N. Kamihara, K. Sedgwick, D. Hornback, A. Deshpande, Kazuyoshi Kurita, A. V. Kazantsev, A. Drees, Ajit Kumar Mohanty, A. Taranenko, T. A. Shibata, Kazushi Miki, T. Horaguchi, T. Sato, Brajesh K. Singh, Y. Watanabe, I. Younus, L. Tomášek, A. Soldatov, P. Mikeš, T. C. Awes, Kyoichiro Ozawa, T. Liška, J. S. Bok, Jun Kikuchi, D. Isenhower, A. Toia, L. Mašek, H. Iinuma, T. Niita, A. P.T. Palounek, W. A. Zajc, V. Baublis, A. Denisov, V. Cianciolo, Y. Tomita, Sergey Fokin, H. A. Gustafsson, C. Zhang, P. Ružička, Viktor Riabov, C. L. Woody, A. Berdnikov, I. V. Sourikova, E. J. Desmond, M. Togawa, E. Vazquez-Zambrano, J. Park, Y. Tsuchimoto, M. Ouchida, N. Means, J. Asai, I. E. Yushmanov, Alexei Khanzadeev, Shingo Sakai, E. Stenlund, T. L. Thomas, Y. Nakamiya, Ryugo S. Hayano, Y. Riabov, Kenta Shigaki, M. Nguyen, A. S. Nyanin, Rachid Nouicer, M. Proissl, G. Baksay, T. V. Moukhanova, R. Vértesi, J. E. Frantz, Y. J. Kim, F. Matathias, Kensuke Homma, E. Richardson, P. Constantin, S. Chernichenko, K. I. Hahn, K. O. Eyser, A. K. Purwar, K. Fujiwara, B. Bassalleck, M. Konno, Y. L. Yamaguchi, J. T. Mitchell, E. Leitner, R. Seidl, Vladislav Manko, M. Slunečka, A. Yu. Semenov, J. Gosset, S. Belikov, C. Vale, B. S. Chang, Christine Angela Aidala, J. Klay, S. Yokkaichi, H. W. Van Hecke, R. Belmont, J. S. Kapustinsky, V. Babintsev, G. S. Kyle, James Alexander, R. Averbeck, Byung-Sik Hong, A. Bazilevsky, D. Kotchetkov, Philippe Rosnet, V. S. Pantuev, Alexandre Lebedev, J. Hamblen, D. M. Lee, S. Bathe, K. Okada, B. Sahlmueller, H. En'yo, Agneta Oskarsson, M. J. Leitch, K. Kiriluk, Y. Berdnikov, Y. Akiba, M. Mishra, S. Nagamiya, Vaclav Vrba, Klaus Johannes Reygers, Rui Wei, A. Kiss, Henner Buesching, Steve Edwards, Marcus Hohlmann, and L. A. Linden Levy

Subjects
Nuclear reaction, Physics, Nuclear and High Energy Physics, Jet (fluid), Meson, 010308 nuclear & particles physics, Hadron, Parton, Elementary particle, 01 natural sciences, Nuclear physics, Momentum, Pion, 0103 physical sciences, High Energy Physics::Experiment, Atomic physics, Nuclear Experiment, 010306 general physics
Abstract

Pair correlations between large transverse momentum neutral pion triggers (p(T) = 4-7 GeV/c) and charged hadron partners (p(T) = 3-7 GeV/c) in central (0%-20%) and midcentral (20%-60%) Au + Au collisions at root s(NN) = 200 GeV are presented as a function of trigger orientation with respect to the reaction plane. The particles are at larger momentum than where jet shape modifications have been observed, and the correlations are sensitive to the energy loss of partons traveling through hot densematter. An out-of-plane trigger particle produces only 26 +/- 20% of the away-side pairs that are observed opposite of an in-plane trigger particle for midcentral (20%-60%) collisions. In contrast, near-side jet fragments are consistent with no suppression or dependence on trigger orientation with respect to the reaction plane. These observations are qualitatively consistent with a picture of little near-side parton energy loss either due to surface bias or fluctuations and increased away-side parton energy loss due to a long path through the medium. The away-side suppression as a function of reaction-plane angle is shown to be sensitive to both the energy loss mechanism and the space-time evolution of heavy-ion collisions.

Published
2011
Full Text
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143. Event structure and double helicity asymmetry in jet production from polarizedp+pcollisions ats=200 GeV

Author

Maya Hachiya Shimomura, J. H. Kang, J. S. Haggerty, A. Romana, R. Pak, N. Kamihara, Y. I. Makdisi, Y. Nakamiya, G. Baksay, R. Armendariz, Kazuyoshi Kurita, A. Drees, J. L. Charvet, J. Kubart, E. H. Kim, Y. S. Lai, M. J. Tannenbaum, T. E. Miller, D. Mukhopadhyay, R. A. Soltz, John Hill, C. A. Ogilvie, Herve Borel, D. Lynch, S. Rembeczki, X. He, O. O. Omiwade, T. K. Hemmick, M. Grosse Perdekamp, S. P. Sorensen, H. A. Torii, Yasuo Miake, Dylan Walker, Toru Sugitate, L. D. Isenhower, J. Gosset, P. Chung, V. Peresedov, L. Kochenda, S. Yokkaichi, M. Rosati, J. G. Boissevain, Masashi Kaneta, V. L. Rykov, T. Dahms, Charles Maguire, S. Butsyk, A. Kiss, Vladimir Samsonov, L. Aphecetche, C. Pinkenburg, W. S. Emam, H. Kanou, M. Stepanov, G. Roche, Taku Gunji, H. Gong, J. Seele, R. Vértesi, A. V. Kazantsev, F. Kajihara, Z. Yasin, Henner Buesching, S. Batsouli, H. Masui, A. K. Dubey, H. Delagrange, J. Chiba, N. N. Ajitanand, A. A. Bickley, K. Dehmelt, C. R. Cleven, C. Haegemann, Y. Inoue, A. A. Vinogradov, S. Afanasiev, François Fleuret, B. Love, Marcus Hohlmann, V. S. Pantuev, S. Zhou, J. G. Lajoie, T. Hachiya, I. J. Choi, A. Kravitz, D. Winter, D. Yu Peressounko, S. F. Pate, A. Ster, J. Egdemir, Jason Kamin, Jiangyong Jia, Y. Goto, Kiyoshi Tanida, E. Kistenev, J. T. Mitchell, A. G. Litvinenko, R. Seidl, Vladislav Manko, P. MikeÅ, Takao Sakaguchi, Dong-Hun Kim, M. Slunečka, Y. L. Yamaguchi, B. Komkov, Johannes Peter Wessels, S. N. White, Tamas Ferenc Csorgo, A. Hadj Henni, J. L. Nagle, M. Gonin, Jen-Chieh Peng, Jan Rak, R. Lacey, P. Tarján, H. Al-Bataineh, Takahiro Nakamura, S. P. Stoll, J. Newby, O. Zaudtke, S. Belikov, C. Klein-Boesing, Junji Tojo, Mate Csanad, K. Boyle, M. Ouchida, Norio Saito, C. Silvestre, M. A. L. Leite, H. Harada, H. Pereira, K. Nakano, J. Asai, A. Kozlov, M. Virius, R. Seto, N. Grau, Wei Xie, R. Granier de Cassagnac, A. Adare, D. Hornback, Xiong Wang, C. Vale, B. S. Chang, J. E. Frantz, K. Haruna, A. Taranenko, S. S.E. Rosendahl, Susumu Oda, W. A. Zajc, V. Baublis, A. Denisov, V. Cianciolo, T. A. Shibata, Marisilvia Donadelli, V. Bumazhnov, M. P. Comets, Andry Malala Rakotozafindrabe, Kazushi Miki, W. E. Sondheim, K. Okada, Senta Greene, Dong Jo Kim, M. B. Deaton, Y. Tanaka, Hiroaki Ohnishi, V. Papavassiliou, Sébastien Gadrat, Christine Angela Aidala, J. Klay, B. Sahlmueller, H. En'yo, D. Isenhower, A. Toia, P. A. Rukoyatkin, T. Ichihara, Osamu Jinnouchi, A. D. Frawley, T. Tabaru, S. H. Aronson, Shingo Sakai, T. L. Thomas, Alexei Khanzadeev, E. Stenlund, H. Sakata, S. Takagi, B. E. Norman, K. N. Barish, E. O'Brien, Matthew G. Reuter, Takahiro Fusayasu, F. Matathias, K. Das, E. P. Hartouni, M. J. Leitch, A. Durum, K. Shoji, Ryugo S. Hayano, K. O. Eyser, A. K. Purwar, K. Fujiwara, Kensuke Homma, P. W. Stankus, Sergey Fokin, T. C. Awes, Y. Riabov, Kyoichiro Ozawa, Kenta Shigaki, F. Staley, L. Baksay, Rushan Han, V. Babintsev, T. Horaguchi, Jun Kikuchi, Eva Haslum, B. Lenzi, Alexander Malakhov, D. Silvermyr, Alexander Milov, A. Glenn, I. Ravinovich, M. Nguyen, I. Nakagawa, P. Constantin, Steven E. Skutnik, W. Holzmann, H. Pei, M. Mitrovski, L. S. Zolin, W. J. Park, David D'Enterria, A. S. Nyanin, S. Chernichenko, Rachid Nouicer, M. Issah, Y. Nagata, O. Drapier, Frank Ellinghaus, G. S. Kyle, O. Dietzsch, K. S. Sim, V. Dzhordzhadze, E. R. Kinney, E. T. Atomssa, M. K. Lee, Y. Kwon, Xingguo Li, D. P. Morrison, S. Campbell, B. Bassalleck, C. L. Woody, M. Wysocki, H. W. Van Hecke, H. Valle, M. D. Malik, L. TomáÅek, P. D. Barnes, E. Vznuzdaev, A. Yanovich, H. Qu, D. E. Fields, James Alexander, B. V. Jacak, V. E. Semenov, M. Konno, J. Zimányi, H. Hiejima, Tatsuya Chujo, I. Tserruya, R. Averbeck, Robert F. Hobbs, Byung-Sik Hong, T. V. Moukhanova, Yu. Efremenko, S. Bathe, H. Iinuma, V. Singh, Agneta Oskarsson, A. Bazilevsky, Minghui Liu, Hideki Hamagaki, K. Aoki, Julia Velkovska, Y. Berdnikov, G. David, A. P.T. Palounek, M. McCumber, M. N. Wagner, Philippe Rosnet, Y. Akiba, M. Mishra, S. Nagamiya, I. V. Sourikova, E. J. Desmond, Y. Fukao, A. Shevel, Debashish Pal, M. L. Brooks, K. Imai, S. Sawada, Vaclav Vrba, Klaus Johannes Reygers, T. Hester, J. Ying, A. Franz, Alexandre Lebedev, H. A. Gustafsson, M. Togawa, C. Zhang, D. M. Lee, J. Park, V-N. Tram, M. Heffner, Anne Marie Sickles, Kenneth Francis Read, Motoi Inaba, Viktor Riabov, Y. Tsuchimoto, I. E. Yushmanov, G. R. Young, Tadaaki Isobe, R. Bennett, P. L. McGaughey, M. Chiu, M. Finger, B. Azmoun, A. Král, M. J. Kweon, M. Oka, A. Dion, Atsushi Taketani, A. Enokizono, K. S. Joo, T. LiÅka, S. Esumi, D. Sharma, Tae-Yeon Lee, Martin Purschke, D. Kotchetkov, A. Morreale, Z. Fraenkel, G. Bunce, A. Churyn, D. Jouan, A. Deshpande, Y. Watanabe, I. Younus, A. Soldatov, M. Naglis, C. L. Silva, Masayasu Ishihara, Susumu Sato, D. Kawall, V. I. Kochetkov, J. Murata, Gerd Joachim Kunde, I. Shein, Alberto Baldisseri, C. P. Singh, B. M. Johnson, A. Isupov, C. Suire, J. Sziklai, Brian Cole, L. MaÅek, Saskia Mioduszewski, J. Jin, E. M. Takagui, R. S. Towell, I. Garishvili, Akio Kiyomichi, N. Kurihara, C. Y. Chi, Y. J. Mao, and S. Kametani

Subjects
Quantum chromodynamics, Physics, Nuclear and High Energy Physics, Particle physics, Photon, 010308 nuclear & particles physics, media_common.quotation_subject, Lambda, 01 natural sciences, 7. Clean energy, Helicity, Asymmetry, Charged particle, Gluon, Nuclear physics, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Event generator, media_common
Abstract

We report on the event structure and double helicity asymmetry (A(LL)) of jet production in longitudinally polarized p + p collisions at root s = 200 GeV. Photons and charged particles were measured by the PHENIX experiment at midrapidity vertical bar eta vertical bar 2 GeV/c) photon in the event. Event structure, such as multiplicity, p(T) density and thrust in the PHENIX acceptance, were measured and compared with the results from the PYTHIA event generator and the GEANT detector simulation. The shape of jets and the underlying event were well reproduced at this collision energy. For the measurement of jet A(LL), photons and charged particles were clustered with a seed-cone algorithm to obtain the cluster pT sum (p(T)(reco)). The effect of detector response and the underlying events on p(T)(reco) was evaluated with the simulation. The production rate of reconstructed jets is satisfactorily reproduced with the next-to-leading-order and perturbative quantum chromodynamics jet production cross section. For 4 = 49% we measured Lambda(LL) = -0.0014 +/- 0.0037(stat) at the lowest p(T)(reco) bin (4-5 GeV= c) and -0.0181 +/- 0.0282(stat) at the highest p(T)(reco) bin (10-12 GeV= c) with a beam polarization scale error of 9.4% and a pT scale error of 10%. Jets in the measured p(T)(reco) range arise primarily from hard-scattered gluons with momentum fraction 0: 02 < x < 0: 3 according to PYTHIA. The measured A(LL) is compared with predictions that assume various Delta G(x) distributions based on the Gluck-Reya-Stratmann-Vogelsang parameterization. The present result imposes the limit -a.1 < integral(0.3)(0.02) dx Delta G(x, mu(2) = GeV2) < 0.4 at 95% confidence level or integral(0.3)(0.002) dx Delta G(x, mu(2) = 1 GeV2) < 0.5 at 99% confidence level.

Published
2011
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144. Identified charged hadron production inp+pcollisions ats=200and 62.4 GeV

Author

S. Bathe, K. S. Sim, V. Dzhordzhadze, Y. L. Yamaguchi, B. Komkov, Agneta Oskarsson, L. Aphecetche, Y. Kwon, Mate Csanad, Y. Berdnikov, Y. Akiba, Norio Saito, Hiroaki Ohnishi, K. B. Lee, R. Yang, M. A. L. Leite, H. Hiejima, M. Rosati, M. Mishra, S. Nagamiya, Vaclav Vrba, Klaus Johannes Reygers, Alexander Milov, I. Nakagawa, T. Engelmore, K. Imai, M. Ouchida, J. S. Kapustinsky, S. N. White, V. Babintsev, N. Means, Johannes Peter Wessels, J. Asai, V. S. Pantuev, Y. Ikeda, C. M. Camacho, Tae-Yeon Lee, A. A. Vinogradov, D. Roach, K. M. Kijima, Martin Purschke, O. Drapier, Frank Ellinghaus, E. R. Kinney, D. P. Morrison, S. Campbell, David D'Enterria, C. Baumann, H. Pei, J. G. Boissevain, E. J. Mannel, S. Afanasiev, A. Ster, Prashant Shukla, S. F. Pate, Masashi Kaneta, Zvi Hirsh Citron, R. A. Soltz, Shingo Sakai, H. Liu, Anne Marie Sickles, K. O. Eyser, A. K. Purwar, K. Fujiwara, Jiangyong Jia, Y. Goto, C. P. Singh, H. Iinuma, A. P.T. Palounek, D. Kotchetkov, K. Nakano, B. M. Johnson, V. E. Semenov, J. Zimányi, J. Newby, K. A. Drees, Maya Hachiya Shimomura, Xingguo Li, M. Naglis, C. L. Silva, H. Al-Bataineh, A. Morreale, W. A. Zajc, K. Shoji, M. I. Nagy, M. Issah, V. Baublis, A. Denisov, Y. Tomita, T. L. Thomas, Junji Tojo, I. Ravinovich, E. H. Kim, Tatsuya Chujo, W. E. Sondheim, D. Ivanischev, Sergey Fokin, M. Gonin, A. Isupov, C. Suire, Z. Fraenkel, I. Tserruya, R. Pak, Yu. Efremenko, C. Pinkenburg, Y. I. Makdisi, N. Kamihara, P. A. Rukoyatkin, P. W. Stankus, Masayasu Ishihara, M. D. Malik, E. Vznuzdaev, M. Grosse Perdekamp, D. E. Fields, H. A. Gustafsson, J. Sziklai, C. Zhang, M. N. Wagner, R. Vértesi, R. K. Choudhury, Y. Nagata, V. Singh, M. Bai, B. V. Jacak, Ryugo S. Hayano, G. R. Young, K. S. Joo, Brian Cole, D. Hornback, Y. Riabov, A. Sukhanov, H. Pereira, M. Stepanov, Susumu Sato, G. Roche, Y. J. Mao, S. Butsyk, S. Kametani, T. Horaguchi, B. Meredith, Y. Morino, P. Ružička, K. Okada, H. Hamagaki, R. S. Towell, A. Hadj Henni, Minghui Liu, Vladimir Samsonov, Viktor Riabov, R. Armendariz, Kenta Shigaki, Y. Fukao, A. Shevel, M. Nguyen, M. McCumber, I. Garishvili, Akio Kiyomichi, F. Wei, Y. Onuki, T. Hester, A. Taranenko, D. Kawall, H. Themann, H. W. Van Hecke, M. J. Tannenbaum, John Hill, J. H. Kang, J. S. Haggerty, V. I. Kochetkov, Beomkyu Kim, K. Boyle, Jan Rak, Ajit Kumar Mohanty, Wei Xie, T. A. Shibata, R. Hobbs, N. Kurihara, B. Sahlmueller, Kazushi Miki, M. Heffner, A. S. Nyanin, Kenneth Francis Read, H. En'yo, M. J. Leitch, Rachid Nouicer, G. S. Kyle, James Alexander, R. Lacey, Toru Sugitate, L. D. Isenhower, Kazuyoshi Kurita, A. Drees, A. Romana, J. Murata, H. Torii, Gerd Joachim Kunde, S. Esumi, D. Sharma, R. Granier de Cassagnac, A. Adare, O. Dietzsch, Steven E. Skutnik, R. Bennett, Brajesh K. Singh, C. Y. Chi, E. T. Atomssa, M. B. Deaton, T. Sato, J. E. Frantz, M. Finger, S. Dairaku, A. V. Kazantsev, K. Das, R. Averbeck, Byung-Sik Hong, H. Valle, C. L. Woody, A. Berdnikov, A. Bazilevsky, Philippe Rosnet, R. Ichimiya, Tamas Ferenc Csorgo, K. Dehmelt, D. Mukhopadhyay, I. Shein, S. Rembeczki, Y. Tanaka, J. Kubart, Dipanwita Dutta, K. Sakashita, O. Zaudtke, V. Cianciolo, H. Qu, S. P. Sorensen, Alexandre Lebedev, Jen-Chieh Peng, Alexei Khanzadeev, Dylan Walker, M. Virius, E. P. Hartouni, V-N. Tram, N. Grau, D. M. Lee, L. Tomášek, François Fleuret, A. Kiss, J. L. Nagle, P. Mikeš, B. Azmoun, K. Sedgwick, Alberto Baldisseri, A. Král, F. Matathias, A. Deshpande, M. J. Kweon, E. Stenlund, H. Sakata, Y. S. Lai, Julia Velkovska, N. N. Ajitanand, Takahiro Nakamura, K. Aoki, K. Kiriluk, G. David, J. Egdemir, Z. Yasin, D. Winter, Motoi Inaba, I. V. Sourikova, Xiong Wang, Saskia Mioduszewski, J. Chiba, Y. Watanabe, Seong H. Kim, T. Ichihara, M. Oka, A. Yu. Semenov, Dong Jo Kim, J. G. Lajoie, T. Hachiya, D. Yu Peressounko, Susumu Oda, Jason Kamin, Osamu Jinnouchi, Henner Buesching, S. P. Stoll, A. Glenn, S. Gadrat, C. Silvestre, Kensuke Homma, T. C. Awes, A. Dion, Kyoichiro Ozawa, T. Liška, I. Younus, Takao Sakaguchi, Matthew G. Reuter, Takahiro Fusayasu, J. Gosset, A. Durum, A. Veicht, C. Klein-Boesing, F. Staley, L. Baksay, Eva Haslum, B. Lenzi, P. Tarján, T. V. Moukhanova, C. R. Cleven, C. Haegemann, Y. Inoue, S. S.E. Rosendahl, G. Bunce, Alexander Malakhov, Herve Borel, D. Lynch, Marisilvia Donadelli, V. Bumazhnov, M. P. Comets, Charles Maguire, Jun Kikuchi, Tadaaki Isobe, I. J. Choi, A. Soldatov, Atsushi Taketani, A. Enokizono, P. Liebing, A. Kravitz, J. Jin, E. M. Takagui, A. D. Frawley, T. Tabaru, Marcus Hohlmann, Andry Malala Rakotozafindrabe, D. Silvermyr, K. Yamaura, D. Isenhower, A. Toia, A. Churyn, E. J. Desmond, V. L. Rykov, T. Dahms, R. Tanabe, D. Layton, S. Huang, S. H. Aronson, P. L. McGaughey, M. Togawa, L. S. Zolin, W. J. Park, J. Park, S. Yokkaichi, T. Kempel, Dong-Hun Kim, Kiyoshi Tanida, E. Kistenev, P. D. Barnes, A. Yanovich, L. Mašek, D. Jouan, W. Holzmann, M. K. Lee, P. Constantin, S. Chernichenko, Y. Tsuchimoto, W. C. Chang, M. Chiu, H. Harada, I. E. Yushmanov, Rushan Han, C. A. Ogilvie, Senta Greene, T. K. Hemmick, B. Bassalleck, Yasuo Miake, A. T. Basye, B. E. Norman, T. Niita, B. Fadem, E. O'Brien, M. Konno, L. Kochenda, H. Kanou, Taku Gunji, H. Gong, J. T. Mitchell, J. Seele, F. Kajihara, R. Seidl, Vladislav Manko, M. Slunečka, H. Delagrange, S. Belikov, C. Vale, B. S. Chang, Christine Angela Aidala, J. Klay, Y. Nakamiya, S. Zhou, G. Baksay, S. D. Rolnick, J. L. Charvet, T. E. Miller, M. Kurosawa, P. Chung, J. Imrek, W. S. Emam, V. Papavassiliou, Debashish Pal, S. Sawada, J. Ying, A. Franz, M. Mitrovski, M. Wysocki, S. Takagi, K. N. Barish, M. L. Brooks, B. Love, A. G. Litvinenko, A. Kozlov, R. Seto, K. Haruna, X. He, O. O. Omiwade, V. Peresedov, J. Koster, S. Batsouli, H. Masui, A. K. Dubey, and A. A. Bickley

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Meson, 010308 nuclear & particles physics, Hadron, 7. Clean energy, 01 natural sciences, Nuclear physics, Baryon, Pion, Antimatter, 0103 physical sciences, Rapidity, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider, Nucleon
Abstract

Transverse momentum distributions and yields for pi(+/-), K-+/-, p, and (p) over bar in p + p collisions at root s = 200 and 62.4 GeV at midrapidity are measured by the PHENIX experiment at the Relativistic Heavy Ion Collider (RHIC). These data provide important baseline spectra for comparisons with identified particle spectra in heavy ion collisions at RHIC. We present the inverse slope parameter T-inv, mean transverse momentum , and yield per unit rapidity dN/dy at each energy, and compare them to other measurements at different root s in p + p and p + (p) over bar collisions. We also present the scaling properties such as m(T) scaling and x(T) scaling on the p(T) spectra between different energies. To discuss the mechanism of the particle production in p + p collisions, the measured spectra are compared to next-to-leading-order or next-to-leading-logarithmic perturbative quantum chromodynamics calculations.

Published
2011
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145. Suppression of back-to-back hadron pairs at forward rapidity in d+Au collisions at √s(NN)=200 GeV

Author

A, Adare, S, Afanasiev, C, Aidala, N N, Ajitanand, Y, Akiba, H, Al-Bataineh, J, Alexander, A, Angerami, K, Aoki, N, Apadula, Y, Aramaki, E T, Atomssa, R, Averbeck, T C, Awes, B, Azmoun, V, Babintsev, M, Bai, G, Baksay, L, Baksay, K N, Barish, B, Bassalleck, A T, Basye, S, Bathe, V, Baublis, C, Baumann, A, Bazilevsky, S, Belikov, R, Belmont, R, Bennett, A, Berdnikov, Y, Berdnikov, J H, Bhom, D S, Blau, J S, Bok, K, Boyle, M L, Brooks, H, Buesching, V, Bumazhnov, G, Bunce, S, Butsyk, S, Campbell, A, Caringi, C-H, Chen, C Y, Chi, M, Chiu, I J, Choi, J B, Choi, R K, Choudhury, P, Christiansen, T, Chujo, P, Chung, O, Chvala, V, Cianciolo, Z, Citron, B A, Cole, Z, Conesa del Valle, M, Connors, M, Csanád, T, Csörgo, T, Dahms, S, Dairaku, I, Danchev, K, Das, A, Datta, G, David, M K, Dayananda, A, Denisov, A, Deshpande, E J, Desmond, K V, Dharmawardane, O, Dietzsch, A, Dion, M, Donadelli, O, Drapier, A, Drees, K A, Drees, J M, Durham, A, Durum, D, Dutta, L, D'Orazio, S, Edwards, Y V, Efremenko, F, Ellinghaus, T, Engelmore, A, Enokizono, H, En'yo, S, Esumi, B, Fadem, D E, Fields, M, Finger, F, Fleuret, S L, Fokin, Z, Fraenkel, J E, Frantz, A, Franz, A D, Frawley, K, Fujiwara, Y, Fukao, T, Fusayasu, I, Garishvili, A, Glenn, H, Gong, M, Gonin, Y, Goto, R, Granier de Cassagnac, N, Grau, S V, Greene, G, Grim, M, Grosse Perdekamp, T, Gunji, H-Å, Gustafsson, J S, Haggerty, K I, Hahn, H, Hamagaki, J, Hamblen, R, Han, J, Hanks, E, Haslum, R, Hayano, X, He, M, Heffner, T K, Hemmick, T, Hester, J C, Hill, M, Hohlmann, W, Holzmann, K, Homma, B, Hong, T, Horaguchi, D, Hornback, S, Huang, T, Ichihara, R, Ichimiya, Y, Ikeda, K, Imai, M, Inaba, D, Isenhower, M, Ishihara, M, Issah, A, Isupov, D, Ivanischev, Y, Iwanaga, B V, Jacak, J, Jia, X, Jiang, J, Jin, B M, Johnson, T, Jones, K S, Joo, D, Jouan, D S, Jumper, F, Kajihara, J, Kamin, J H, Kang, J, Kapustinsky, K, Karatsu, M, Kasai, D, Kawall, M, Kawashima, A V, Kazantsev, T, Kempel, A, Khanzadeev, K M, Kijima, J, Kikuchi, A, Kim, B I, Kim, D J, Kim, E J, Kim, Y-J, Kim, E, Kinney, Á, Kiss, E, Kistenev, L, Kochenda, B, Komkov, M, Konno, J, Koster, A, Král, A, Kravitz, G J, Kunde, K, Kurita, M, Kurosawa, Y, Kwon, G S, Kyle, R, Lacey, Y S, Lai, J G, Lajoie, A, Lebedev, D M, Lee, J, Lee, K B, Lee, K S, Lee, M J, Leitch, M A L, Leite, X, Li, P, Lichtenwalner, P, Liebing, L A, Linden Levy, T, Liška, A, Litvinenko, H, Liu, M X, Liu, B, Love, D, Lynch, C F, Maguire, Y I, Makdisi, A, Malakhov, M D, Malik, V I, Manko, E, Mannel, Y, Mao, H, Masui, F, Matathias, M, McCumber, P L, McGaughey, N, Means, B, Meredith, Y, Miake, T, Mibe, A C, Mignerey, K, Miki, A, Milov, J T, Mitchell, A K, Mohanty, H J, Moon, Y, Morino, A, Morreale, D P, Morrison, T V, Moukhanova, T, Murakami, J, Murata, S, Nagamiya, J L, Nagle, M, Naglis, M I, Nagy, I, Nakagawa, Y, Nakamiya, K R, Nakamura, T, Nakamura, K, Nakano, S, Nam, J, Newby, M, Nguyen, M, Nihashi, R, Nouicer, A S, Nyanin, C, Oakley, E, O'Brien, S X, Oda, C A, Ogilvie, M, Oka, K, Okada, Y, Onuki, A, Oskarsson, M, Ouchida, K, Ozawa, R, Pak, V, Pantuev, V, Papavassiliou, I H, Park, S K, Park, W J, Park, S F, Pate, H, Pei, J-C, Peng, H, Pereira, V, Peresedov, D Yu, Peressounko, R, Petti, C, Pinkenburg, R P, Pisani, M, Proissl, M L, Purschke, H, Qu, J, Rak, I, Ravinovich, K F, Read, K, Reygers, V, Riabov, Y, Riabov, E, Richardson, D, Roach, G, Roche, S D, Rolnick, M, Rosati, C A, Rosen, S S E, Rosendahl, P, Rukoyatkin, P, Ružička, B, Sahlmueller, N, Saito, T, Sakaguchi, K, Sakashita, V, Samsonov, S, Sano, T, Sato, S, Sawada, K, Sedgwick, J, Seele, R, Seidl, R, Seto, D, Sharma, I, Shein, T-A, Shibata, K, Shigaki, M, Shimomura, K, Shoji, P, Shukla, A, Sickles, C L, Silva, D, Silvermyr, C, Silvestre, K S, Sim, B K, Singh, C P, Singh, V, Singh, M, Slunečka, R A, Soltz, W E, Sondheim, S P, Sorensen, I V, Sourikova, P W, Stankus, E, Stenlund, S P, Stoll, T, Sugitate, A, Sukhanov, J, Sziklai, E M, Takagui, A, Taketani, R, Tanabe, Y, Tanaka, S, Taneja, K, Tanida, M J, Tannenbaum, S, Tarafdar, A, Taranenko, H, Themann, D, Thomas, T L, Thomas, M, Togawa, A, Toia, L, Tomášek, H, Torii, R S, Towell, I, Tserruya, Y, Tsuchimoto, C, Vale, H, Valle, H W, van Hecke, E, Vazquez-Zambrano, A, Veicht, J, Velkovska, R, Vértesi, M, Virius, V, Vrba, E, Vznuzdaev, X R, Wang, D, Watanabe, K, Watanabe, Y, Watanabe, F, Wei, R, Wei, J, Wessels, S N, White, D, Winter, C L, Woody, R M, Wright, M, Wysocki, Y L, Yamaguchi, K, Yamaura, R, Yang, A, Yanovich, J, Ying, S, Yokkaichi, Z, You, G R, Young, I, Younus, I E, Yushmanov, W A, Zajc, S, Zhou, and L, Zolin

Abstract

Back-to-back hadron pair yields in d+Au and p+p collisions at √s(NN)=200 GeV were measured with the PHENIX detector at the Relativistic Heavy Ion Collider. Rapidity separated hadron pairs were detected with the trigger hadron at pseudorapidity |η|0.35 and the associated hadron at forward rapidity (deuteron direction, 3.0η3.8). Pairs were also detected with both hadrons measured at forward rapidity; in this case, the yield of back-to-back hadron pairs in d+Au collisions with small impact parameters is observed to be suppressed by a factor of 10 relative to p+p collisions. The kinematics of these pairs is expected to probe partons in the Au nucleus with a low fraction x of the nucleon momenta, where the gluon densities rise sharply. The observed suppression as a function of nuclear thickness, p(T), and η points to cold nuclear matter effects arising at high parton densities.

Published
2011

146. Measurements of higher order flow harmonics in Au+Au collisions at √s(NN)=200 GeV

Author

A, Adare, S, Afanasiev, C, Aidala, N N, Ajitanand, Y, Akiba, H, Al-Bataineh, J, Alexander, K, Aoki, Y, Aramaki, E T, Atomssa, R, Averbeck, T C, Awes, B, Azmoun, V, Babintsev, M, Bai, G, Baksay, L, Baksay, K N, Barish, B, Bassalleck, A T, Basye, S, Bathe, V, Baublis, C, Baumann, A, Bazilevsky, S, Belikov, R, Belmont, R, Bennett, A, Berdnikov, Y, Berdnikov, A A, Bickley, J S, Bok, K, Boyle, M L, Brooks, H, Buesching, V, Bumazhnov, G, Bunce, S, Butsyk, C M, Camacho, S, Campbell, C-H, Chen, C Y, Chi, M, Chiu, I J, Choi, R K, Choudhury, P, Christiansen, T, Chujo, P, Chung, O, Chvala, V, Cianciolo, Z, Citron, B A, Cole, M, Connors, P, Constantin, M, Csanád, T, Csörgo, T, Dahms, S, Dairaku, I, Danchev, K, Das, A, Datta, G, David, A, Denisov, A, Deshpande, E J, Desmond, O, Dietzsch, A, Dion, M, Donadelli, O, Drapier, A, Drees, K A, Drees, J M, Durham, A, Durum, D, Dutta, S, Edwards, Y V, Efremenko, F, Ellinghaus, T, Engelmore, A, Enokizono, H, En'yo, S, Esumi, B, Fadem, D E, Fields, M, Finger, F, Fleuret, S L, Fokin, Z, Fraenkel, J E, Frantz, A, Franz, A D, Frawley, K, Fujiwara, Y, Fukao, T, Fusayasu, I, Garishvili, A, Glenn, H, Gong, M, Gonin, Y, Goto, R, Granier de Cassagnac, N, Grau, S V, Greene, M, Grosse Perdekamp, T, Gunji, H-Å, Gustafsson, J S, Haggerty, K I, Hahn, H, Hamagaki, J, Hamblen, R, Han, J, Hanks, E P, Hartouni, E, Haslum, R, Hayano, X, He, M, Heffner, T K, Hemmick, T, Hester, J C, Hill, M, Hohlmann, W, Holzmann, K, Homma, B, Hong, T, Horaguchi, D, Hornback, S, Huang, T, Ichihara, R, Ichimiya, J, Ide, Y, Ikeda, K, Imai, M, Inaba, D, Isenhower, M, Ishihara, T, Isobe, M, Issah, A, Isupov, D, Ivanischev, B V, Jacak, J, Jia, J, Jin, B M, Johnson, K S, Joo, D, Jouan, D S, Jumper, F, Kajihara, S, Kametani, N, Kamihara, J, Kamin, J H, Kang, J, Kapustinsky, K, Karatsu, D, Kawall, M, Kawashima, A V, Kazantsev, T, Kempel, A, Khanzadeev, K M, Kijima, B I, Kim, D H, Kim, D J, Kim, E, Kim, E J, Kim, S H, Kim, Y J, Kim, E, Kinney, K, Kiriluk, Á, Kiss, E, Kistenev, L, Kochenda, B, Komkov, M, Konno, J, Koster, D, Kotchetkov, A, Kozlov, A, Král, A, Kravitz, G J, Kunde, K, Kurita, M, Kurosawa, Y, Kwon, G S, Kyle, R, Lacey, Y S, Lai, J G, Lajoie, A, Lebedev, D M, Lee, J, Lee, K, Lee, K B, Lee, K S, Lee, M J, Leitch, M A L, Leite, E, Leitner, B, Lenzi, X, Li, P, Liebing, L A, Linden Levy, T, Liška, A, Litvinenko, H, Liu, M X, Liu, B, Love, R, Luechtenborg, D, Lynch, C F, Maguire, Y I, Makdisi, A, Malakhov, M D, Malik, V I, Manko, E, Mannel, Y, Mao, H, Masui, F, Matathias, M, McCumber, P L, McGaughey, N, Means, B, Meredith, Y, Miake, A C, Mignerey, P, Mikeš, K, Miki, A, Milov, M, Mishra, J T, Mitchell, A K, Mohanty, Y, Morino, A, Morreale, D P, Morrison, T V, Moukhanova, J, Murata, S, Nagamiya, J L, Nagle, M, Naglis, M I, Nagy, I, Nakagawa, Y, Nakamiya, T, Nakamura, K, Nakano, J, Newby, M, Nguyen, R, Nouicer, A S, Nyanin, E, O'Brien, S X, Oda, C A, Ogilvie, M, Oka, K, Okada, Y, Onuki, A, Oskarsson, M, Ouchida, K, Ozawa, R, Pak, V, Pantuev, V, Papavassiliou, I H, Park, J, Park, S K, Park, W J, Park, S F, Pate, H, Pei, J-C, Peng, H, Pereira, V, Peresedov, D Yu, Peressounko, C, Pinkenburg, R P, Pisani, M, Proissl, M L, Purschke, A K, Purwar, H, Qu, J, Rak, A, Rakotozafindrabe, I, Ravinovich, K F, Read, K, Reygers, V, Riabov, Y, Riabov, E, Richardson, D, Roach, G, Roche, S D, Rolnick, M, Rosati, C A, Rosen, S S E, Rosendahl, P, Rosnet, P, Rukoyatkin, P, Ružička, B, Sahlmueller, N, Saito, T, Sakaguchi, K, Sakashita, V, Samsonov, S, Sano, T, Sato, S, Sawada, K, Sedgwick, J, Seele, R, Seidl, A Yu, Semenov, R, Seto, D, Sharma, I, Shein, T-A, Shibata, K, Shigaki, M, Shimomura, K, Shoji, P, Shukla, A, Sickles, C L, Silva, D, Silvermyr, C, Silvestre, K S, Sim, B K, Singh, C P, Singh, V, Singh, M, Slunečka, R A, Soltz, W E, Sondheim, S P, Sorensen, I V, Sourikova, N A, Sparks, P W, Stankus, E, Stenlund, S P, Stoll, T, Sugitate, A, Sukhanov, J, Sziklai, E M, Takagui, A, Taketani, R, Tanabe, Y, Tanaka, K, Tanida, M J, Tannenbaum, S, Tarafdar, A, Taranenko, P, Tarján, H, Themann, T L, Thomas, M, Togawa, A, Toia, L, Tomášek, H, Torii, R S, Towell, I, Tserruya, Y, Tsuchimoto, C, Vale, H, Valle, H W, van Hecke, E, Vazquez-Zambrano, A, Veicht, J, Velkovska, R, Vértesi, A A, Vinogradov, M, Virius, V, Vrba, E, Vznuzdaev, X R, Wang, D, Watanabe, K, Watanabe, Y, Watanabe, F, Wei, R, Wei, J, Wessels, S N, White, D, Winter, J P, Wood, C L, Woody, R M, Wright, M, Wysocki, W, Xie, Y L, Yamaguchi, K, Yamaura, R, Yang, A, Yanovich, J, Ying, S, Yokkaichi, Z, You, G R, Young, I, Younus, I E, Yushmanov, W A, Zajc, C, Zhang, S, Zhou, and L, Zolin

Abstract

Flow coefficients ν(n) for n=2, 3, 4, characterizing the anisotropic collective flow in Au+Au collisions at √s(NN)=200 GeV, are measured relative to event planes Ψ(n), determined at large rapidity. We report ν(n) as a function of transverse momentum and collision centrality, and study the correlations among the event planes of different order n. The ν(n) are well described by hydrodynamic models which employ a Glauber Monte Carlo initial state geometry with fluctuations, providing additional constraining power on the interplay between initial conditions and the effects of viscosity as the system evolves. This new constraint can serve to improve the precision of the extracted shear viscosity to entropy density ratio η/s.

Published
2011

147. Measurement of neutral mesons inp+pcollisions ats=200 GeVand scaling properties of hadron production

Author

X. He, O. O. Omiwade, L. Aphecetche, K. Sakashita, P. Tarján, V. Peresedov, C. L. Woody, A. Berdnikov, J. Egdemir, Jason Kamin, T. Csörgő, S. P. Stoll, W. A. Zajc, J. Koster, V. S. Pantuev, Senta Greene, V. Baublis, A. Denisov, S. S.E. Rosendahl, Johannes Peter Wessels, V. Cianciolo, Y. Tomita, G. Bunce, A. T. Basye, Maya Hachiya Shimomura, M. Rosati, B. Meredith, Sergey Fokin, I. V. Sourikova, E. H. Kim, B. E. Norman, B. Fadem, E. O'Brien, J. T. Mitchell, A. Churyn, A. V. Kazantsev, S. Batsouli, H. Masui, A. K. Dubey, C. Baumann, Junji Tojo, Anne Marie Sickles, C. P. Singh, D. Jouan, B. M. Johnson, A. Isupov, Y. I. Makdisi, M. B. Deaton, J. Sziklai, Brian Cole, John Hill, R. Seidl, A. A. Bickley, R. A. Soltz, K. Okada, Toru Sugitate, L. D. Isenhower, A. Hadj Henni, M. Grosse Perdekamp, B. Sahlmueller, Y. Tanaka, H. En'yo, G. R. Young, S. Takagi, Vladislav Manko, M. J. Leitch, M. J. Tannenbaum, Beomkyu Kim, K. Boyle, Wei Xie, H. A. Gustafsson, M. Ouchida, M. Slunečka, Mate Csanad, N. Means, J. Asai, K. N. Barish, C. A. Ogilvie, G. S. Kyle, H. Torii, François Fleuret, I. Tserruya, C. Zhang, T. K. Hemmick, James Alexander, Yu. Efremenko, M. Mitrovski, P. Ružička, D. Winter, Yasuo Miake, D. Mukhopadhyay, S. Rembeczki, R. Averbeck, Byung-Sik Hong, K. S. Sim, A. Bazilevsky, T. Ichihara, S. Belikov, L. Tomášek, D. Yu Peressounko, P. Mikeš, A. A. Vinogradov, Viktor Riabov, V. Dzhordzhadze, Y. Kwon, Matthew G. Reuter, Philippe Rosnet, Hiroaki Ohnishi, K. B. Lee, Takahiro Fusayasu, Shingo Sakai, K. A. Drees, T. L. Thomas, F. Staley, L. Baksay, V. Singh, S. Bathe, H. Pei, Alexander Malakhov, L. Kochenda, R. Yang, M. Wysocki, H. Hiejima, M. L. Brooks, H. Iinuma, J. Chiba, Ryugo S. Hayano, Y. Riabov, I. Ravinovich, Takao Sakaguchi, B. Azmoun, A. Král, M. J. Kweon, Agneta Oskarsson, M. K. Lee, Alexandre Lebedev, D. M. Lee, K. Kiriluk, Y. L. Yamaguchi, B. Komkov, Y. Berdnikov, Jiangyong Jia, Y. Goto, B. Love, Robert F. Hobbs, Y. Akiba, C. Klein-Boesing, M. I. Nagy, A. P.T. Palounek, R. Pak, N. Kamihara, C. Vale, B. S. Chang, Christine Angela Aidala, J. Klay, M. Issah, Kenta Shigaki, M. Nguyen, M. Mishra, S. Nagamiya, A. D. Frawley, T. Tabaru, K. Imai, Norio Saito, M. D. Malik, E. Vznuzdaev, R. Armendariz, M. A. L. Leite, F. Matathias, K. Das, E. P. Hartouni, David D'Enterria, Vaclav Vrba, Klaus Johannes Reygers, A. G. Litvinenko, S. Huang, Kensuke Homma, R. Vértesi, A. S. Nyanin, S. H. Aronson, Kazuyoshi Kurita, T. C. Awes, Kyoichiro Ozawa, T. Liška, Y. Onuki, K. O. Eyser, A. K. Purwar, K. Fujiwara, J. S. Kapustinsky, P. Constantin, S. Chernichenko, D. Roach, Y. Nagata, A. Drees, W. Holzmann, K. M. Kijima, C. R. Cleven, M. Oka, V. Babintsev, Jun Kikuchi, Jan Rak, Rachid Nouicer, B. Bassalleck, C. Haegemann, Y. Inoue, A. Dion, A. Kozlov, J. Kubart, R. Lacey, Ajit Kumar Mohanty, M. Bai, Debashish Pal, M. Konno, R. Seto, K. Haruna, S. Sawada, R. Granier de Cassagnac, T. A. Shibata, A. Adare, T. Sato, J. E. Frantz, Atsushi Taketani, A. Enokizono, Y. Nakamiya, P. Liebing, M. N. Wagner, Y. Fukao, J. Ying, A. Franz, H. W. Van Hecke, A. Shevel, Charles Maguire, Xingguo Li, Alexei Khanzadeev, Tae-Yeon Lee, G. Baksay, K. Dehmelt, E. Stenlund, Martin Purschke, H. Sakata, T. Hester, Kiyoshi Tanida, A. Kiss, O. Dietzsch, Jen-Chieh Peng, E. Kistenev, Z. Yasin, Henner Buesching, E. T. Atomssa, H. Valle, S. P. Sorensen, Dylan Walker, Dipanwita Dutta, D. Isenhower, T. V. Moukhanova, C. M. Camacho, D. Kotchetkov, Marcus Hohlmann, Prashant Shukla, A. Toia, E. J. Desmond, H. Harada, A. Morreale, Julia Velkovska, V-N. Tram, N. Grau, S. F. Pate, Minghui Liu, L. Mašek, Seong H. Kim, D. E. Fields, M. Togawa, J. Park, T. Kempel, Dong-Hun Kim, Xiong Wang, B. V. Jacak, Z. Fraenkel, Motoi Inaba, M. Heffner, J. G. Lajoie, Y. Tsuchimoto, T. Hachiya, R. Bennett, T. Niita, Dong Jo Kim, Osamu Jinnouchi, Kenneth Francis Read, I. E. Yushmanov, H. Al-Bataineh, I. J. Choi, A. Kravitz, M. McCumber, R. K. Choudhury, Tadaaki Isobe, M. Gonin, K. S. Joo, J. L. Charvet, V. Papavassiliou, M. Finger, Sébastien Gadrat, A. Veicht, P. L. McGaughey, A. Sukhanov, H. Pereira, M. Chiu, Y. Morino, T. E. Miller, M. Kurosawa, Christophe Pierre Suire, Alexander Milov, I. Nakagawa, T. Engelmore, O. Drapier, Frank Ellinghaus, S. Esumi, N. N. Ajitanand, E. R. Kinney, Herve Borel, D. P. Morrison, S. Campbell, D. Lynch, D. Sharma, V. E. Semenov, J. Zimányi, R. Ichimiya, Tatsuya Chujo, P. Chung, Eva Haslum, B. Lenzi, Steven E. Skutnik, J. Imrek, V. L. Rykov, T. Dahms, Takahiro Nakamura, S. Dairaku, W. S. Emam, S. Afanasiev, O. Zaudtke, Susumu Oda, A. Ster, H. Kanou, Taku Gunji, H. Gong, J. Seele, M. Virius, F. Kajihara, J. Newby, H. Delagrange, A. Durum, K. Yamaura, S. Zhou, A. Glenn, S. D. Rolnick, D. Hornback, H. Qu, A. Taranenko, Kazushi Miki, Hideki Hamagaki, K. Aoki, D. Silvermyr, L. S. Zolin, W. J. Park, P. D. Barnes, A. Yanovich, G. David, Brajesh K. Singh, H. Liu, S. N. White, K. Shoji, Zvi Hirsh Citron, K. Nakano, P. W. Stankus, W. E. Sondheim, D. Ivanischev, Saskia Mioduszewski, P. A. Rukoyatkin, J. Jin, E. M. Takagui, R. S. Towell, I. Garishvili, Akio Kiyomichi, F. Wei, N. Kurihara, C. Y. Chi, Y. Ikeda, J. G. Boissevain, E. J. Mannel, Masashi Kaneta, C. Pinkenburg, M. Stepanov, G. Roche, Y. J. Mao, S. Kametani, T. Horaguchi, J. H. Kang, J. S. Haggerty, A. Romana, Y. S. Lai, A. Yu. Semenov, J. Gosset, S. Butsyk, Vladimir Samsonov, S. Yokkaichi, J. L. Nagle, C. Silvestre, Marisilvia Donadelli, V. Bumazhnov, M. P. Comets, Andry Malala Rakotozafindrabe, R. Tanabe, D. Layton, W. C. Chang, Rushan Han, D. Kawall, H. Themann, V. I. Kochetkov, J. Murata, Gerd Joachim Kunde, I. Shein, K. Sedgwick, Alberto Baldisseri, M. Naglis, C. L. Silva, Masayasu Ishihara, Susumu Sato, A. Deshpande, Y. Watanabe, I. Younus, and A. Soldatov

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Meson, 010308 nuclear & particles physics, Hadron, Omega baryon, 01 natural sciences, 7. Clean energy, Omega, Nuclear physics, Baryon, Particle decay, 0103 physical sciences, Tsallis distribution, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider
Abstract

The PHENIX experiment at the Relativistic Heavy Ion Collider has measured the invariant differential cross section for production of K-S(0), omega, eta', and phi mesons in p + p collisions at root s 200 GeV. Measurements of omega and phi production in different decay channels give consistent results. New results for the omega are in agreement with previously published data and extend the measured p(T) coverage. The spectral shapes of all hadron transverse momentum distributions measured by PHENIX are well described by a Tsallis distribution functional form with only two parameters, n and T, determining the high-p(T) and characterizing the low-p(T) regions of the spectra, respectively. The values of these parameters are very similar for all analyzed meson spectra, but with a lower parameter T extracted for protons. The integrated invariant cross sections calculated from the fitted distributions are found to be consistent with existing measurements and with statistical model predictions.

Published
2011
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148. Nuclear modification factors ofϕmesons ind+Au,Cu+Cu, andAu+Aucollisions atsNN=200 GeV

Author

Aaron Angerami, J. M. Burward-Hoy, W. A. Zajc, V. Baublis, A. Denisov, V. Cianciolo, Hongfang Liu, D. E. Fields, W. C. Smith, H. A. Gustafsson, C. Zhang, B. V. Jacak, P. Ružička, Viktor Riabov, Sergey Fokin, T. Horaguchi, M. McCumber, A. K. Purwar, M. K. Lee, J. L. Drachenberg, R. A. Soltz, H. Borel, Gary Grim, S. Batsouli, K. V. Dharmawardane, M. Grosse Perdekamp, J. Hanks, Prashant Shukla, S. F. Pate, Marisilvia Donadelli, V. Bumazhnov, M. P. Comets, M. E. Connors, K. A. Drees, J. Gosset, A. V. Kazantsev, S. Belikov, K. S. Joo, J. L. Charvet, H. Iinuma, M. C. McCain, A. P.T. Palounek, Ke. Nakamura, V. S. Pantuev, Sung Keun Park, S. Kelly, N. N. Ajitanand, J. P. Sullivan, K. Sakashita, D. Watanabe, M. D. Malik, T. E. Miller, K. Tanida, E. Vznuzdaev, Takahiro Nakamura, T. Jones, J. Hamblen, Peter Christiansen, S. P. Sorensen, K. Watanabe, M. Rosati, L. Tomášek, R. Tanabe, H. Al-Bataineh, K. Das, A. Enokizono, Dylan Walker, K. Shoji, D. Winter, D. Yu Peressounko, Y. Fukao, Susumu Oda, A. Shevel, P. Mikeš, P. Tarján, P. Chung, D. Kotov, N. Apadula, R. Vértesi, K. Okada, M. Holmes, E. P. Hartouni, B. Sahlmueller, T. Shohjoh, A. Durum, X. Jiang, S. Yokkaichi, H. En'yo, S. V. Afanasiev, Catherine Micaela Silvestre, L. Aphecetche, P. W. Stankus, P. Constantin, M. J. Leitch, W. S. Emam, A. Datta, D. S. Brown, K. Yamaura, H. Kanou, Y. Ikeda, S. Bathe, J. G. Boissevain, T. Hester, J. Egdemir, Taku Gunji, H. Gong, J. Seele, Masashi Kaneta, T. Tabaru, Senta Greene, F. Kajihara, Agneta Oskarsson, A. Dion, M. I. Nagy, T. C. Awes, H. Delagrange, S. Esumi, Kyoichiro Ozawa, T. Liška, C. Pinkenburg, A. T. Basye, Johannes Peter Wessels, J. S. Bok, O. Chvala, Jun Kikuchi, C. R. Cleven, B. E. Norman, B. Fadem, E. O'Brien, D. Sharma, R. Ichimiya, Jason Kamin, Rushan Han, M. N. Hagiwara, Y. Berdnikov, C. Haegemann, Y. Inoue, A. Hadj Henni, V. Papavassiliou, Sébastien Gadrat, Xiao-yan Li, T. Murakami, M. Stepanov, Robert F. Hobbs, G. Roche, S. Kametani, S. Butsyk, S. Zhou, A. A. Vinogradov, Henrik Tydesjö, Y. Akiba, B. Azmoun, Y. J. Mao, M. Mishra, A. Král, M. J. Kweon, J. H. Kang, Beomkyu Kim, J. S. Haggerty, P. J. Kroon, Wei Xie, Vladimir Samsonov, I. Otterlund, A. Baldisseri, A. Romana, S. Nagamiya, Kazuhiro Tanaka, S. P. Stoll, T. Kempel, S. D. Rolnick, Masamichi Ishihara, Y. Le Bornec, Y. S. Kim, Dong-Hun Kim, S. W. Nam, Vaclav Vrba, Minghui Liu, B. Komkov, Klaus Johannes Reygers, Jiangyong Jia, Y. Goto, M. Chiu, Ajit Kumar Mohanty, Debashish Pal, M. Heffner, Kenneth Francis Read, Tamas Ferenc Csorgo, T. A. Shibata, C. L. Silva, T. Sato, T. Ichihara, Y. S. Lai, J. L. Nagle, J. Murata, M. Oka, S. Sawada, Tadaaki Isobe, J. Ying, A. Franz, Steven E. Skutnik, K. S. Lee, J. S. Chai, Margaret Harvey, V-N. Tram, N. Grau, Norio Saito, Tsutomu Mibe, D. Isenhower, A. Toia, S. S.E. Rosendahl, G. Bunce, M. Slunečka, P. L. McGaughey, B. Espagnon, P. Liebing, Tae-Yeon Lee, M. A. L. Leite, J. G. Lajoie, L. Mašek, Martin Purschke, F. Gastineau, D. Kotchetkov, H. Qu, Alexei Khanzadeev, A. Morreale, Z. Fraenkel, A. Kiss, Motoi Inaba, T. Hachiya, Hideki Hamagaki, K. Aoki, G. David, K. I. Hahn, R. K. Choudhury, A. Churyn, R. Belmont, J. S. Kapustinsky, R. M. Wright, Mate Csanad, M. Mitrovski, V. Babintsev, Z. Yasin, Henner Buesching, E. Stenlund, D. Jouan, G. S. Kyle, Steve Edwards, N. Willis, J. B. Choi, H. Sakata, James Alexander, O. Dietzsch, R. Averbeck, Byung-Sik Hong, A. Bazilevsky, M. Nihashi, E. T. Atomssa, H. Valle, I. J. Choi, A. Kravitz, Philippe Rosnet, J. M. Heuser, Marcus Hohlmann, Alexandre Lebedev, David D'Enterria, Dipanwita Dutta, D. M. Lee, C. A. Ogilvie, Julia Velkovska, R. P. Pisani, M. Gonin, Maya Hachiya Shimomura, M. K. Dayananda, L. A. Linden Levy, T. K. Hemmick, M. Wysocki, J. M. Durham, Nikolay Tyurin, J. H. Bhom, Yasuo Miake, K. O. Eyser, K. Fujiwara, M. N. Wagner, Y. L. Yamaguchi, Y. I. Makdisi, T. V. Moukhanova, L. Kochenda, M. Issah, Dmitry Blau, A. Sukhanov, M. B. Deaton, K. Kurita, H. Pereira, H. W. Van Hecke, Y. Morino, T. Kawagishi, E. J. Desmond, R. Pak, Hiroaki Ohnishi, K. B. Lee, Y. Tanaka, E. Mannel, M. Togawa, E. Vazquez-Zambrano, T. K. Shea, J. Park, Florian Bauer, N. Kamihara, M. J. Tannenbaum, A. Rakotozafindrabe, Aram Kim, M. Kasai, R. Armendariz, Y. Tsuchimoto, Y. Iwanaga, H. Torii, I. E. Yushmanov, C. Oakley, A. Drees, Eun-Hee Kim, H. J. Moon, L. Baksay, J. Kubart, Charles Maguire, S. Leckey, D. Mukhopadhyay, S. Rembeczki, D. Bucher, Josh Moss, D. Kawall, J. Chiba, Alice Mignerey, E. Kistenev, H. Themann, L. D'Orazio, V. I. Kochetkov, G. C. Mishra, P. Lichtenwalner, Takao Sakaguchi, M. Kurosawa, Y. Nakamiya, D. Lynch, C. Klein-Boesing, Gerd Joachim Kunde, H. Harada, I. Shein, A. D. Frawley, H. Pei, G. Baksay, Saskia Mioduszewski, M. T. Bjorndal, K. Sedgwick, S. Huang, S. H. Aronson, S. Dairaku, A. Deshpande, W. Holzmann, O. Zaudtke, Y. J. Kim, J. T. Mitchell, Y. Watanabe, R. Seidl, I. Younus, A. Soldatov, Vladislav Manko, M. Naglis, J. Jin, M. Virius, Susumu Sato, E. M. Takagui, F. Staley, C. Vale, B. S. Chang, R. S. Towell, Christine Angela Aidala, J. Klay, N. Borggren, C. H. Chen, I. Garishvili, Akio Kiyomichi, F. Wei, F. Matathias, Y. Cobigo, Kensuke Homma, E. Richardson, X. He, O. O. Omiwade, S. Chernichenko, J. E. Frantz, Jongmin Lee, H. Lim, Y. Aramaki, V. Peresedov, B. Bassalleck, N. Kurihara, J. Koster, M. Konno, H. Masui, A. K. Dubey, A. Glenn, A. Taketani, A. A. Bickley, D. S. Jumper, B. Love, Marie Germain, V. L. Rykov, T. Dahms, M. G. Hur, C. Y. Chi, A. G. Litvinenko, I. Ravinovich, A. Kozlov, Y. Nagata, R. Seto, M. Bai, K. Haruna, S. S. Ryu, C. Baumann, V. Dzhordzhadze, I. Danchev, S. Takagi, K. N. Barish, Zhiying You, R. Bennett, M. Kawashima, K. S. Sim, C. P. Singh, B. M. Johnson, Ahmed Al-Jamel, M. Finger, S. Sano, Junji Tojo, Y. Kwon, R. J. Petti, R. Yang, H. Hiejima, M. Ouchida, N. Means, A. Isupov, C. Suire, J. Sziklai, I. Tserruya, M. L. Brooks, S. Taneja, Yu. Efremenko, J. Asai, Brian Cole, V. Singh, K. Imai, Shingo Sakai, Hirohiko Sato, S. K. Tuli, Eunja Kim, T. L. Thomas, K. Dehmelt, Jen-Chieh Peng, S. Y. Fung, K. Karatsu, Inkyu Park, Xiong Wang, Z. Conesa del Valle, Anne Marie Sickles, Dong Jo Kim, B. Meredith, A. Veicht, Ryugo S. Hayano, Alexander Milov, I. Nakagawa, T. Engelmore, O. Drapier, John Hill, Frank Ellinghaus, E. R. Kinney, Y. Riabov, D. P. Morrison, S. Campbell, V. E. Semenov, J. Zimányi, Kenta Shigaki, G. R. Young, Tatsuya Chujo, Toru Sugitate, M. Nguyen, L. D. Isenhower, Y. Onuki, A. Ster, D. Roach, K. M. Kijima, A. S. Nyanin, Jan Rak, J. Newby, Rachid Nouicer, Xingguo Li, M. Proissl, R. Lacey, D. Hornback, François Fleuret, B. Forestier, A. Taranenko, Kazushi Miki, Brajesh K. Singh, R. Granier de Cassagnac, A. Adare, C. L. Woody, A. Berdnikov, K. Hasuko, S. Tarafdar, S. N. White, A. Caringi, Joakim Nystrand, Eva Haslum, B. Lenzi, Deepa Thomas, I. V. Sourikova, Zvi Hirsh Citron, K. Nakano, W. E. Sondheim, D. Ivanischev, K. Boyle, P. A. Rukoyatkin, Osamu Jinnouchi, Matthew G. Reuter, Takahiro Fusayasu, I. D. Ojha, Alexander Malakhov, D. Silvermyr, L. S. Zolin, W. J. Park, Christopher Rosen, P. D. Barnes, and A. Yanovich

Subjects
Physics, Nuclear and High Energy Physics, Valence (chemistry), Meson, Proton, 010308 nuclear & particles physics, Hadron, Phi meson, 01 natural sciences, 7. Clean energy, Baryon, Nuclear physics, Antiproton, 0103 physical sciences, Atomic physics, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider
Abstract

The PHENIX experiment at the Relativistic Heavy Ion Collider has performed systematic measurements of phi meson production in the K+K- decay channel at midrapidity in p + p, d + Au, Cu + Cu, and Au + Au collisions at root s(NN) = 200 GeV. Results are presented on the phi invariant yield and the nuclear modification factor R-AA for Au + Au and Cu + Cu, and R-dA for d + Au collisions, studied as a function of transverse momentum (1 < p(T) < 7 GeV/c) and centrality. In central and midcentral Au + Au collisions, the R-AA of phi exhibits a suppression relative to expectations from binary scaled p + p results. The amount of suppression is smaller than that of the pi(0) and the. in the intermediate p(T) range (2-5 GeV/c), whereas, at higher p(T), the phi, pi(0), and. show similar suppression. The baryon (proton and antiproton) excess observed in central Au + Au collisions at intermediate p(T) is not observed for the phi meson despite the similar masses of the proton and the phi. This suggests that the excess is linked to the number of valence quarks in the hadron rather than its mass. The difference gradually disappears with decreasing centrality, and, for peripheral collisions, the R-AA values for both particle species are consistent with binary scaling. Cu + Cu collisions show the same yield and suppression as Au + Au collisions for the same number of N-part. The R-dA of phi shows no evidence for cold nuclear effects within uncertainties.

Published
2011
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149. Cross Section and Parity-Violating Spin Asymmetries ofW±Boson Production in Polarizedp+pCollisions ats=500 GeV

Author

M. Kasai, A. Deshpande, B. Meredith, Alice Mignerey, John Hill, Toru Sugitate, L. D'Orazio, M. Sarsour, Mate Csanad, François Fleuret, D. Watanabe, A. Iordanova, T. Ichihara, Takahiro Fusayasu, Alexander Malakhov, D. Silvermyr, L. S. Zolin, A. Yanovich, Takao Sakaguchi, M. Mendoza, S. N. White, E. Vznuzdaev, Y. J. Kwon, Deepa Thomas, Marisilvia Donadelli, V. Bumazhnov, Zvi Hirsh Citron, K. Nakano, W. E. Sondheim, D. Ivanischev, K. Boyle, P. A. Rukoyatkin, D. Kotov, Dmitry Blau, E. J. Desmond, M. Ouchida, N. Means, A. D. Frawley, M. Nihashi, Alexander Milov, I. Nakagawa, Atsushi Takahara, Aaron Angerami, Hongfang Liu, R. Tanabe, Young-Ki Kim, T. Engelmore, T. Murakami, D. E. Fields, B. Love, J. S. Kang, K. A. Drees, S. Huang, Y. L. Yamaguchi, Y. Watanabe, Jason Kamin, M. Togawa, E. Vazquez-Zambrano, W. A. Zajc, M. Rosati, K. B. Lee, B. V. Jacak, R. S. Towell, I. Ravinovich, Y. Ikeda, V. Baublis, I. Younus, S. P. Stoll, A. Denisov, C. Harper, E. J. Mannel, E. R. Kinney, V. Cianciolo, T. Kempel, D. P. Morrison, A. G. Litvinenko, W. Holzmann, S. Kaneti, H. Pei, S. Campbell, S. Sawada, Y. Miyachi, Y. Tsuchimoto, Sergey Fokin, Y. Iwanaga, B. H. Kang, I. Garishvili, T. Csörgő, F. Wei, R. P. Pisani, M. Bai, V. S. Pantuev, J. Ying, A. Franz, S. S.E. Rosendahl, G. Bunce, Rushan Han, A. Dion, M. I. Nagy, Maya Hachiya Shimomura, R. S. Hollis, I. E. Yushmanov, M. Kurosawa, H. W. Van Hecke, A. Enokizono, H. Al-Ta'Ani, Tatsuya Chujo, B. Azmoun, A. Král, Jiangyong Jia, Y. Goto, Y. I. Makdisi, R. Akimoto, Johannes Peter Wessels, E. C. Aschenauer, M. McCumber, I. Tserruya, J. Hamblen, Vladimir Samsonov, M. Naglis, R. Seto, Senta Greene, D. Roach, D. Jouan, C. L. Woody, A. Berdnikov, Yu. Efremenko, Prashant Shukla, K. V. Dharmawardane, P. L. McGaughey, K. M. Kijima, H. Qu, V. Singh, M. Gonin, C. Pinkenburg, A. T. Basye, A. Kiss, S. F. Pate, A. Caringi, C. Y. Chi, Hideki Hamagaki, K. Aoki, G. David, Ke. Nakamura, K. S. Sim, B. Fadem, E. O'Brien, M. Chiu, K. Hashimoto, A. Datta, D. Kleinjan, Eric Appelt, M. J. Tannenbaum, K. R. Andrews, R. A. Soltz, K. Okada, Beomkyu Kim, O. Drapier, B. Sahlmueller, Y. Fukao, Henner Buesching, H. Iinuma, C. A. Ogilvie, Xingguo Li, Zhiying You, R. Yang, R. Bennett, R. Armendariz, Kisung Lee, T. K. Hemmick, Ajit Kumar Mohanty, Y. J. Mao, H. Torii, M. Grosse Perdekamp, H. En'yo, Masayasu Ishihara, J. Hanks, K. N. Barish, Sung Keun Park, M. J. Leitch, T. Hester, J. M. Durham, M. E. Connors, Yasuo Miake, K. Watanabe, Yosuke Watanabe, T. A. Shibata, C. L. Silva, S. P. Sorensen, S. Taneja, K. Shoji, T. Sato, A. V. Kazantsev, E. Tennant, L. Guo, J. L. Nagle, P. Castera, Alexei Khanzadeev, M. Finger, S. Dairaku, N. N. Ajitanand, X. Gong, L. Kochenda, M. Issah, A. Glenn, I. V. Sourikova, K. Imai, E. Stenlund, S. Sano, J. H. Kang, J. S. Haggerty, S. R. Lee, J. B. Choi, O. Chvala, I. J. Choi, P. W. Stankus, L. A. Linden Levy, D. Kawall, Eunja Kim, M. Savastio, L. Tomášek, S. Motschwiller, H. A. Gustafsson, D. Isenhower, Jan Rak, R. Lacey, Takahiro Nakamura, V. Papavassiliou, K. Utsunomiya, Jen-Chieh Peng, R. Pak, J. G. Lajoie, T. Jones, Ryugo S. Hayano, R. Granier de Cassagnac, Peter Christiansen, H. Themann, M. L. Brooks, Y. Riabov, A. Adare, D. McGlinchey, Agneta Oskarsson, D. Winter, J. E. Frantz, X. He, Kenta Shigaki, M. Virius, Charles Maguire, D. Yu Peressounko, Y. Berdnikov, Y. Akiba, C. McKinney, M. Nguyen, Inkyu Park, Y. Aramaki, V. Peresedov, N. Grau, Xiong Wang, Robert Vertesi, E. M. Takagui, Byoungchoo Park, Kazuyoshi Kurita, Taku Gunji, Z. Conesa del Valle, T. V. Moukhanova, O. Dietzsch, J. Murata, C. Baumann, K. Karatsu, A. Durum, J. Ben-Benjamin, D. Hornback, S. Nagamiya, Viktor Riabov, Gerd Joachim Kunde, Dong Jo Kim, J. Koster, C. Oakley, T. C. Awes, Kyoichiro Ozawa, A. Drees, J. S. Bok, Y. Hori, Anne Marie Sickles, C. P. Singh, A. S. Nyanin, Catherine Micaela Silvestre, Vaclav Vrba, Klaus Johannes Reygers, Y. S. Lai, Rui Wei, B. M. Johnson, Motoi Inaba, H. Masui, S. H. Lee, S. Butsyk, I. Shein, R. J. Petti, A. Veicht, R. M. Wright, K. Sedgwick, A. Isupov, Rachid Nouicer, Kiyoshi Tanida, S. Zhou, M. Oka, A. N. Zelenski, M. Proissl, C. H. Chen, G. R. Young, A. Sukhanov, J. Sziklai, H. Pereira, Minghui Liu, S. D. Rolnick, A. Manion, E. Kistenev, J. S. Yoo, Brian Cole, M. K. Dayananda, Julia Velkovska, Y. Morino, Kenneth Francis Read, M. Wysocki, P. Kline, B. Bannier, P. Lichtenwalner, T. Sodre, Jongmin Lee, J. Sun, S. Yokkaichi, Atsushi Taketani, Y. Tanaka, D. Lynch, Martin Purschke, H. J. Moon, D. Broxmeyer, A. Morreale, R. K. Choudhury, K. S. Joo, N. Apadula, A. Vossen, S. Esumi, D. Sharma, J. T. Mitchell, R. Ichimiya, R. Seidl, Vladislav Manko, M. Slunečka, C. Vale, S. Afanasiev, Christine Angela Aidala, S. Bathe, Kensuke Homma, E. Richardson, J. Newby, G. Roche, K. I. Hahn, B. Bassalleck, M. Konno, Y. Nakamiya, Y. J. Kim, A. Taranenko, Kazushi Miki, T. Horaguchi, Brajesh K. Singh, S. Tarafdar, Eva Haslum, B. Komkov, Norio Saito, Tsutomu Mibe, M. A. L. Leite, H. H. Shim, S. H. Lim, R. Belmont, J. S. Kapustinsky, V. Babintsev, X. Jiang, M. Tomášek, G. S. Kyle, James Alexander, Byung-Sik Hong, A. Bazilevsky, Alexandre Lebedev, and D. M. Lee

Subjects
Quark, Physics, Particle physics, Antiparticle, 010308 nuclear & particles physics, General Physics and Astronomy, Elementary particle, Astrophysics::Cosmology and Extragalactic Astrophysics, Fermion, 01 natural sciences, 7. Clean energy, Nuclear physics, Positron, Antimatter, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Boson, Lepton
Abstract

Large parity-violating longitudinal single-spin asymmetries A(L)(e+) = 0.86(-0.14)(+0.30) and Ae(L)(e-) = 0.88(-0.71)(+0.12) are observed for inclusive high transverse momentum electrons and positrons in polarized p + p collisions at a center-of-mass energy of root s = 500 GeV with the PHENIX detector at RHIC. These e(+/-) come mainly from the decay of W-+/- and Z(0) bosons, and their asymmetries directly demonstrate parity violation in the couplings of the W-+/- to the light quarks. The observed electron and positron yields were used to estimate W-+/- boson production cross sections for the e(+/-) channels of sigma(pp -> W+X) X BR(W+ -> e(+) nu(e)) = 144.1 +/- 21.2(stat)(-10.3)(+3.4)(syst) +/- 21.6(norm) pb, and sigma(pp -> W-X) X BR(W- -> e(-) (nu) over bar (e)) = 3.17 +/- 12.1(stat)(-8.2)(+10.1)(syst) +/- 4.8(norm) pb.

Published
2011
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150. Identification of significant factors by an extension of ANOVA-PCA based on multi-block analysis

Author

Leigh Schmidtke, D. Jouan-Rimbaud Bouveresse, Douglas N. Rutledge, R. Climaco Pinto, Nathalie Locquet, Ingénierie Procédés Aliments (GENIAL), Institut National de la Recherche Agronomique (INRA)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-AgroParisTech-Conservatoire National des Arts et Métiers [CNAM] (CNAM), KBC, Umeå University, Sch Agr & Wine Sci, Natl Wine & Grape Ind Ctr, and Charles Sturt University [Australia]

Subjects
[SDV.SA]Life Sciences [q-bio]/Agricultural sciences, ANOVA-PCA, Computer science, ComDim, computer.software_genre, 01 natural sciences, Analytical Chemistry, 0404 agricultural biotechnology, F-test, Component (UML), TOOL, Spectroscopy, Common Component and Specific Weights Analysis, Block (data storage), FLUORESCENCE DETECTION, Process Chemistry and Technology, 010401 analytical chemistry, ASCA, 04 agricultural and veterinary sciences, Multi-block analysis, 040401 food science, 0104 chemical sciences, Computer Science Applications, Data set, GRAPES, Identification (information), Principal component analysis, Table (database), PRINCIPAL COMPONENT ANALYSIS, Data mining, Noise (video), computer, Software
Abstract

A modification of the ANOVA-PCA method, proposed by Harrington et al. to identify significant factors and interactions in an experimental design, is presented in this article. The modified method uses the idea of multiple table analysis, and looks for the common dimensions underlying the different data tables, or data blocks, generated by the "ANOVA-step" of the ANOVA-PCA method, in order to identify the significant factors. In this paper, the "Common Component and Specific Weights Analysis" method is used to analyse the calculated multi-block data set. This new method, called AComDim, was compared to the standard ANOVA-PCA method, by analysing four real data sets. Parameters computed during the AComDim procedure enable the computation of F-values to check whether the variability of each original data block is significantly greater than that of the noise. (C) 2010 Elsevier B.V. All rights reserved.

Published
2011
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