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Your search keyword '"Meehan, Kathryn"' showing total 11 results
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11 results on '"Meehan, Kathryn"'

1. Reconstructing the Position and Intensity of Multiple Gamma-Ray Point Sources with a Sparse Parametric Algorithm

Author

Vavrek, Jayson R., Hellfeld, Daniel, Bandstra, Mark S., Negut, Victor, Meehan, Kathryn, Vanderlip, William J., Cates, Joshua W., Pavlovsky, Ryan, Quiter, Brian J., Cooper, Reynold J., and Joshi, Tenzing H. Y.

Subjects
Physics - Instrumentation and Detectors
Abstract

We present an experimental demonstration of Additive Point Source Localization (APSL), a sparse parametric imaging algorithm that reconstructs the 3D positions and activities of multiple gamma-ray point sources. Using a handheld gamma-ray detector array and up to four $8$ ${\mu}$Ci $^{137}$Cs gamma-ray sources, we performed both source-search and source-separation experiments in an indoor laboratory environment. In the majority of the source-search measurements, APSL reconstructed the correct number of sources with position accuracies of ${\sim}20$ cm and activity accuracies (unsigned) of ${\sim}20\%$, given measurement times of two to three minutes and distances of closest approach (to any source) of ${\sim}20$ cm. In source-separation measurements where the detector could be moved freely about the environment, APSL was able to resolve two sources separated by $75$ cm or more given only ${\sim}60$ s of measurement time. In these source-separation measurements, APSL produced larger total activity errors of ${\sim}40\%$, but obtained source separation distances accurate to within $15$ cm. We also compare our APSL results against traditional Maximum Likelihood-Expectation Maximization (ML-EM) reconstructions, and demonstrate improved image accuracy and interpretability using APSL over ML-EM. These results indicate that APSL is capable of accurately reconstructing gamma-ray source positions and activities using measurements from existing detector hardware., Comment: 10 pages, 9 figures. Accepted for publication at IEEE Transactions on Nuclear Science

Published
2020
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2. Reconstructing the Position and Intensity of Multiple Gamma-Ray Point Sources With a Sparse Parametric Algorithm

Author

Vavrek, Jayson R, Hellfeld, Daniel, Bandstra, Mark S, Negut, Victor, Meehan, Kathryn, Vanderlip, William Joe, Cates, Joshua W, Pavlovsky, Ryan, Quiter, Brian J, Cooper, Reynold J, and Joshi, Tenzing HY

Subjects
Synchrotrons and Accelerators, Physical Sciences, Biomedical Imaging, Bioengineering, Gamma-ray imaging, maximum likelihood, Poisson likelihood, radiological source search, source localization, physics.ins-det, NSD-Applied Nuclear Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Other Physical Sciences, Biomedical Engineering, Nuclear & Particles Physics, Nuclear and plasma physics
Abstract

We present an experimental demonstration of additive point source localization (APSL), a sparse parametric imaging algorithm that reconstructs the 3-D positions and activities of multiple gamma-ray point sources. Using a handheld gamma-ray detector array and up to four 8 mu Ci 137Cs gamma-ray sources, we performed both source-search and source-separation experiments in an indoor laboratory environment. In the majority of the source-search measurements, APSL reconstructed the correct number of sources with position accuracies of 20 cm and activity accuracies (unsigned) of 20%, given measurement times of 2 to 3 min and distances of closest approach (to any source) of 20 cm. In source-separation measurements where the detector could be moved freely about the environment, APSL was able to resolve two sources separated by 75 cm or more given only 60 s of measurement time. In these source-separation measurements, APSL produced larger total activity errors of 40%, but obtained source-separation distances accurate to within 15 cm. We also compare our APSL results against traditional maximum likelihood-expectation maximization (ML-EM) reconstructions and demonstrate improved image accuracy and interpretability using APSL over ML-EM. These results indicate that APSL is capable of accurately reconstructing gamma-ray source positions and activities using measurements from existing detector hardware.

Published
2020

3. STAR Results from Au + Au Fixed-Target Collisions at sqrt(s_NN) = 4.5 GeV

Author

Meehan, Kathryn

Subjects
Nuclear Experiment
Abstract

We present results from STAR's first dedicated fixed-target run conducted in 2015 with Au + Au collisions at sqrt(s_NN) = 4.5 GeV. Directed flow of protons and lambdas, elliptic flow of identified hadrons, HBT radii, as well as pion, K^0_s, and Lambda spectra are compared with previous results from the AGS. These results demonstrate that STAR has good event reconstruction and particle identification capabilities in the fixed-target configuration. The implications of these results on future STAR fixed-target runs are discussed., Comment: 4 pages, 9 figures, proceedings for the Quark Matter 2017 conference

Published
2017
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5. Charge-dependent pair correlations relative to a third particle in p + Au and d + Au collisions at RHIC

Author

Adam, Jaroslav, Adamczyk, Leszek, Adams, Joseph R., Adkins, J. Kevin, Agakishiev, Geydar, Aggarwal, Madan Mohan, Ahammed, Zubayer, Alekseev, Igor G., Anderson, Derek M., Aoyama, Ryo, Aparin, Alexey, Arkhipkin, Dmitry A., Aschenauer, Elke Caroline, Ashraf, Muhammad Usman, Atetalla, Fareha, Attri, Anjali, Averichev, Georgy S., Bairathi, Vipul, Barish, Kenneth, Bassill, Aaron J., Behera, Arabinda, Bellwied, Rene, Bhasin, Anju, Bhati, Ashok Kumar, Bielčík, Jaroslav, Bielčíková, Jana, Bland, Leslie C., Bordyuzhin, Igor G., Brandenburg, James D., Brandin, Andrei V., Bryslawskyj, Jason, Bunzarov, Ivan, Butterworth, Joseph, Caines, Helen Louise, Calderón de la Barca Sánchez, Manuel, Cebra, Daniel A., Chakaberia, Irakli, Chaloupka, Petr, Chan, B.K., Chang, F.-H., Chang, Z., Chankova-Bunzarova, N., Chatterjee, A., Chattopadhyay, S., Chen, J.H., Chen, X., Cheng, J., Cherney, Michael Gerard, Christie, William, Crawford, Henry J., Csanád, Máté, Das, Supriya, Dedovič, Tatiana G., Deppner, Ingo Martin, Derevschikov, Anatoly A., Didenko, Lidia, Dilks, Christopher, Dong, X., Drachenberg, James Lucus, Dunlop, James C., Edmonds, Terrence, Elsey, Nicholas, Engelage, Jon M., Eppley, Geary Wareham, Esha, Roli, Esumi, ShinIchi, Evdokimov, Olga Y., Ewigleben, Justin, Eyser, Kjeld Oleg, Fatemi, Renee H., Fazio, Salvatore, Federič, Pavol, Fedorišin, Jan, Feng, Y., Filip, Peter, Finch, Evan, Fisyak, Yuri V., Fulek, Łukasz, Gagliardi, Carl A., Galatyuk, Tetyana, Geurts, Frank, Gibson, Adam, Gopal, Krishan, Grosnick, David P., Gupta, Anik, Guryn, Włodzimierz, Hamad, Ayman, Hamed, Ahmed M., Harris, John W., He, L., Heppelmann, Steven Francis, Herrmann, Norbert, Holub, Lukáš, Hong, Y., Horvat, S., Huang, B., Huang, H.Z., Huang, Shengli, Huang, T., Huang, X., Humanic, Thomas J., Huo, P., Igo, George J., Jacobs, William W., Jena, Chitrasen, Jentsch, Alexander, Ji, Y., Jia, J., Jiang, K., Jowzaee, S., Ju, X., Judd, Eleanor G., Kabana, Sonia, Kagamaster, Skipper, Kalinkin, Dmitry, Kang, K., Kapukchyan, David, Kauder, Kolja, Ke, Hongwei, Keane, Declan, Kechechyan, Armen, Kelsey, Matthew, Khyzhniak, Yevheniia V., Kikoła, Daniel P., Kim, C., Kinghorn, Todd Adler, Kisel, Ivan, Kisiel, Adam Ryszard, Kocan, Michal, Kočenda, L. M., Kosarzewski, Leszek Krzysztof, Kramárik, Lukáš, Kravtsov, Peter, Krueger, Keith William, Kulathunga Mudiyanselage, Nalinda, Kumar, Lokesh, Kunnawalkam Elayavalli, Raghav, Kwasizur, Joseph H., Lacey, Roy Alphanso, Landgraf, Jeffery M., Lauret, Jerome, Lebedev, Alexei, Lednicky, Richard, Lee, J.H., Li, C., Li, W., Li, Xiaomei, Li, Y., Liang, Y., Licenik, Robert, Lin, T., Lipiec, Andrzej, Lisa, Michael A., Liu, F., Liu, H., Liu, P., Liu, T., Liu, X., Liu, Y., Liu, Z., Ljubicic, Tonko A., Llope, William Joseph, Lomnitz, Michael, Longacre, Ronald S., Luo, S., Luo, X., Ma, G.L., Ma, L., Ma, R., Ma, Yu-Gang, Magdy Abdelwahab Abdelrahman, Niseem, Majka, Richard Daniel, Mallick, Dukhishyam, Margetis, Spyridon, Markert, Christina, Matis, Howard S., Matonoha, Oliver, Mazer, Joel Anthony, Meehan, Kathryn, Mei, Jincheng, Minaev, Nikolai G., Mioduszewski, Saskia, Mishra, Debadeepti, Mohanty, Bedangadas, Mondal, Mriganka Mouli, Mooney, Isaac A., Moravcova, Zuzana, Morozov, Dmitry A., Nasim, Md., Nayak, Kishora, Nelson, John M., Nemes, Daniel B., Nie, Maowu, Nigmatkulov, Grigory A., Niida, Takafumi, Nogach, Larisa V., Nonaka, Toshihiro, Odyniec, Grazyna Janina, Ogawa, Akio, Oh, Kunsu, Oh, S., Okorokov, Vitaly A., Page, Brian S., Pak, Robert, Panebratsev, Yuri, Pawlik, Bogdan, Pawłowska, Diana, Pei, Hua, Perkins, Chris, Pintér, Roland Laszlo, Pluta, Jan Marian, Porter, Jeffrey Brent, Posik, Matthew, Pruthi, Navneet Kumar, Przybycien, Mariusz, Putschke, Jörn H., Quintero, Amilkar, Radhakrishnan, Sooraj Krishnan, Ramachandran, Suvarna, Ray, Robert L., Reed, Rosi Jan, Ritter, Hans Georg, Roberts, Jabus B., Rogačevskij, Oleg V., Romero, Juan L., Ruan, Lijuan, Rusnak, Jan, Rusnakova, Olga, Sahoo, Nihar Ranjan, Sahu, Pradip Kumar, Salur, Sevil, Sandweiss, Jack H., Schambach, Joachim, Schmidke, William B., Schmitz, Norbert, Schweid, Benjamin R., Seck, Florian, Seger, Janet Elizabeth, Sergeeva, Maria, Seto, Richard, Seyboth, Peter, Shah, N., Shahaliev, Ehtiram, Shanmuganathan, Prashanth V., Shao, M., Shen, F., Shen, W.Q., Shi, S.S., Shou, Q.Y., Sichtermann, Ernst P., Siejka, Sebastian, Sikora, Rafał, Šimko, Miroslav, Singh, Jagbir, Singha, Subhash, Smirnov, Dmitri V., Smirnov, Nikolai, Solyst, William, Sorensen, Paul Richard, Spinka, Harold. M., Srivastava, Brijesh Kumar, Stanislaus, T. D. Shirvel, Stefaniak, Maria, Stewart, David J., Strichanov, Michail Nikolaevič, Stringfellow, Blair, Suaide, Alexandre Alarcon do Passo, Sugiura, Tetsuro, Šumbera, Michal, Summa, Branden, Sun, X.M., Sun, Y., Surrow, Bernd, Svirida, Dmitry N., Szymański, Paweł, Tang, Aihong, Tang, Zebo, Taranenko, Arkadiy, Tarnowsky, Terence J., Thomas, James H., Timmins, Anthony Robert, Tlusty, David, Todoroki, Takahito, Tokarev, Mikhail V., Tomkiel, Catherine A., Trentalange, Stephen, Tribble, Robert E., Tribedy, Prithwish, Tripathy, Srikanta Kumar, Tsai, Oleg D., Tu, B., Tu, Z., Ullrich, Thomas, Underwood, David G., Upsal, Isaac, Van Buren, Gene, Vanek, Jan, Vasiliev, Alexander Nikolaevich, Vassiliev, Iouri, Videbæk, Flemming, Vokal, Stanislav, Wang, F., Wang, G., Wang, P., Wang, Y., Webb, Jason C., Wen, L., Westfall, Gary D., Wieman, Howard, Wissink, Scott W., Witt, Richard, Wu, Y., Xiao, Z.G., Xie, G., Xie, W., Xu, H., Xu, N., Xu, Q.H., Xu, Y.F., Xu, Z., Yang, C., Yang, Q., Yang, S., Yang, Y., Yang, Z., Ye, Z., Yi, L., Yip, K., Yoo, In-Kwon, Zbroszczyk, Hanna Paulina, Zha, W., Zhang, D., Zhang, L., Zhang, S., Zhang, X.P., Zhang, Y., Zhang, Zuman, Zhao, Jie, Zhong, C., Zhou, C., Zhu, X., Zhu, Z., Zurek, Marian, Zyzak, Maksym, Adam, Jaroslav, Adamczyk, Leszek, Adams, Joseph R., Adkins, J. Kevin, Agakishiev, Geydar, Aggarwal, Madan Mohan, Ahammed, Zubayer, Alekseev, Igor G., Anderson, Derek M., Aoyama, Ryo, Aparin, Alexey, Arkhipkin, Dmitry A., Aschenauer, Elke Caroline, Ashraf, Muhammad Usman, Atetalla, Fareha, Attri, Anjali, Averichev, Georgy S., Bairathi, Vipul, Barish, Kenneth, Bassill, Aaron J., Behera, Arabinda, Bellwied, Rene, Bhasin, Anju, Bhati, Ashok Kumar, Bielčík, Jaroslav, Bielčíková, Jana, Bland, Leslie C., Bordyuzhin, Igor G., Brandenburg, James D., Brandin, Andrei V., Bryslawskyj, Jason, Bunzarov, Ivan, Butterworth, Joseph, Caines, Helen Louise, Calderón de la Barca Sánchez, Manuel, Cebra, Daniel A., Chakaberia, Irakli, Chaloupka, Petr, Chan, B.K., Chang, F.-H., Chang, Z., Chankova-Bunzarova, N., Chatterjee, A., Chattopadhyay, S., Chen, J.H., Chen, X., Cheng, J., Cherney, Michael Gerard, Christie, William, Crawford, Henry J., Csanád, Máté, Das, Supriya, Dedovič, Tatiana G., Deppner, Ingo Martin, Derevschikov, Anatoly A., Didenko, Lidia, Dilks, Christopher, Dong, X., Drachenberg, James Lucus, Dunlop, James C., Edmonds, Terrence, Elsey, Nicholas, Engelage, Jon M., Eppley, Geary Wareham, Esha, Roli, Esumi, ShinIchi, Evdokimov, Olga Y., Ewigleben, Justin, Eyser, Kjeld Oleg, Fatemi, Renee H., Fazio, Salvatore, Federič, Pavol, Fedorišin, Jan, Feng, Y., Filip, Peter, Finch, Evan, Fisyak, Yuri V., Fulek, Łukasz, Gagliardi, Carl A., Galatyuk, Tetyana, Geurts, Frank, Gibson, Adam, Gopal, Krishan, Grosnick, David P., Gupta, Anik, Guryn, Włodzimierz, Hamad, Ayman, Hamed, Ahmed M., Harris, John W., He, L., Heppelmann, Steven Francis, Herrmann, Norbert, Holub, Lukáš, Hong, Y., Horvat, S., Huang, B., Huang, H.Z., Huang, Shengli, Huang, T., Huang, X., Humanic, Thomas J., Huo, P., Igo, George J., Jacobs, William W., Jena, Chitrasen, Jentsch, Alexander, Ji, Y., Jia, J., Jiang, K., Jowzaee, S., Ju, X., Judd, Eleanor G., Kabana, Sonia, Kagamaster, Skipper, Kalinkin, Dmitry, Kang, K., Kapukchyan, David, Kauder, Kolja, Ke, Hongwei, Keane, Declan, Kechechyan, Armen, Kelsey, Matthew, Khyzhniak, Yevheniia V., Kikoła, Daniel P., Kim, C., Kinghorn, Todd Adler, Kisel, Ivan, Kisiel, Adam Ryszard, Kocan, Michal, Kočenda, L. M., Kosarzewski, Leszek Krzysztof, Kramárik, Lukáš, Kravtsov, Peter, Krueger, Keith William, Kulathunga Mudiyanselage, Nalinda, Kumar, Lokesh, Kunnawalkam Elayavalli, Raghav, Kwasizur, Joseph H., Lacey, Roy Alphanso, Landgraf, Jeffery M., Lauret, Jerome, Lebedev, Alexei, Lednicky, Richard, Lee, J.H., Li, C., Li, W., Li, Xiaomei, Li, Y., Liang, Y., Licenik, Robert, Lin, T., Lipiec, Andrzej, Lisa, Michael A., Liu, F., Liu, H., Liu, P., Liu, T., Liu, X., Liu, Y., Liu, Z., Ljubicic, Tonko A., Llope, William Joseph, Lomnitz, Michael, Longacre, Ronald S., Luo, S., Luo, X., Ma, G.L., Ma, L., Ma, R., Ma, Yu-Gang, Magdy Abdelwahab Abdelrahman, Niseem, Majka, Richard Daniel, Mallick, Dukhishyam, Margetis, Spyridon, Markert, Christina, Matis, Howard S., Matonoha, Oliver, Mazer, Joel Anthony, Meehan, Kathryn, Mei, Jincheng, Minaev, Nikolai G., Mioduszewski, Saskia, Mishra, Debadeepti, Mohanty, Bedangadas, Mondal, Mriganka Mouli, Mooney, Isaac A., Moravcova, Zuzana, Morozov, Dmitry A., Nasim, Md., Nayak, Kishora, Nelson, John M., Nemes, Daniel B., Nie, Maowu, Nigmatkulov, Grigory A., Niida, Takafumi, Nogach, Larisa V., Nonaka, Toshihiro, Odyniec, Grazyna Janina, Ogawa, Akio, Oh, Kunsu, Oh, S., Okorokov, Vitaly A., Page, Brian S., Pak, Robert, Panebratsev, Yuri, Pawlik, Bogdan, Pawłowska, Diana, Pei, Hua, Perkins, Chris, Pintér, Roland Laszlo, Pluta, Jan Marian, Porter, Jeffrey Brent, Posik, Matthew, Pruthi, Navneet Kumar, Przybycien, Mariusz, Putschke, Jörn H., Quintero, Amilkar, Radhakrishnan, Sooraj Krishnan, Ramachandran, Suvarna, Ray, Robert L., Reed, Rosi Jan, Ritter, Hans Georg, Roberts, Jabus B., Rogačevskij, Oleg V., Romero, Juan L., Ruan, Lijuan, Rusnak, Jan, Rusnakova, Olga, Sahoo, Nihar Ranjan, Sahu, Pradip Kumar, Salur, Sevil, Sandweiss, Jack H., Schambach, Joachim, Schmidke, William B., Schmitz, Norbert, Schweid, Benjamin R., Seck, Florian, Seger, Janet Elizabeth, Sergeeva, Maria, Seto, Richard, Seyboth, Peter, Shah, N., Shahaliev, Ehtiram, Shanmuganathan, Prashanth V., Shao, M., Shen, F., Shen, W.Q., Shi, S.S., Shou, Q.Y., Sichtermann, Ernst P., Siejka, Sebastian, Sikora, Rafał, Šimko, Miroslav, Singh, Jagbir, Singha, Subhash, Smirnov, Dmitri V., Smirnov, Nikolai, Solyst, William, Sorensen, Paul Richard, Spinka, Harold. M., Srivastava, Brijesh Kumar, Stanislaus, T. D. Shirvel, Stefaniak, Maria, Stewart, David J., Strichanov, Michail Nikolaevič, Stringfellow, Blair, Suaide, Alexandre Alarcon do Passo, Sugiura, Tetsuro, Šumbera, Michal, Summa, Branden, Sun, X.M., Sun, Y., Surrow, Bernd, Svirida, Dmitry N., Szymański, Paweł, Tang, Aihong, Tang, Zebo, Taranenko, Arkadiy, Tarnowsky, Terence J., Thomas, James H., Timmins, Anthony Robert, Tlusty, David, Todoroki, Takahito, Tokarev, Mikhail V., Tomkiel, Catherine A., Trentalange, Stephen, Tribble, Robert E., Tribedy, Prithwish, Tripathy, Srikanta Kumar, Tsai, Oleg D., Tu, B., Tu, Z., Ullrich, Thomas, Underwood, David G., Upsal, Isaac, Van Buren, Gene, Vanek, Jan, Vasiliev, Alexander Nikolaevich, Vassiliev, Iouri, Videbæk, Flemming, Vokal, Stanislav, Wang, F., Wang, G., Wang, P., Wang, Y., Webb, Jason C., Wen, L., Westfall, Gary D., Wieman, Howard, Wissink, Scott W., Witt, Richard, Wu, Y., Xiao, Z.G., Xie, G., Xie, W., Xu, H., Xu, N., Xu, Q.H., Xu, Y.F., Xu, Z., Yang, C., Yang, Q., Yang, S., Yang, Y., Yang, Z., Ye, Z., Yi, L., Yip, K., Yoo, In-Kwon, Zbroszczyk, Hanna Paulina, Zha, W., Zhang, D., Zhang, L., Zhang, S., Zhang, X.P., Zhang, Y., Zhang, Zuman, Zhao, Jie, Zhong, C., Zhou, C., Zhu, X., Zhu, Z., Zurek, Marian, and Zyzak, Maksym

Abstract

Quark interactions with topological gluon configurations can induce chirality imbalance and local parity violation in quantum chromodynamics. This can lead to electric charge separation along the strong magnetic field in relativistic heavy-ion collisions – the chiral magnetic effect (CME). We report measurements by the STAR collaboration of a CME-sensitive observable in p + Au and d + Au collisions at 200 GeV, where the CME is not expected, using charge-dependent pair correlations relative to a third particle. We observe strong charge-dependent correlations similar to those measured in heavy-ion collisions. This bears important implications for the interpretation of the heavy-ion data.

Published
2019

6. Transverse spin-dependent azimuthal correlations of charged pion pairs measured in p↑ + p collisions at √s = 500 GeV

Author

Adamczyk, Leszek, Adams, Joseph R., Adkins, J. Kevin, Agakishiev, Geydar, Aggarwal, Madan Mohan, Ahammed, Zubayer, Ajitanand, N.N., Alekseev, Igor G., Anderson, Derek M., Aoyama, Ryo, Aparin, Alexey, Arkhipkin, Dmitry A., Aschenauer, Elke Caroline, Ashraf, Muhammad Usman, Attri, Anjali, Averichev, Georgy S., Bairathi, Vipul, Barish, Kenneth, Behera, Arabinda, Bellwied, Rene, Bhasin, Anju, Bhati, Ashok Kumar, Bhattarai, P., Bielčík, Jaroslav, Bielčíková, Jana, Bland, Leslie C., Bordyuzhin, Igor G., Bouchet, Jonathan, Brandenburg, James D., Brandin, Andrei V., Brown, D., Bryslawskyj, Jason, Bunzarov, Ivan, Butterworth, Joseph, Caines, Helen Louise, Calderón de la Barca Sánchez, Manuel, Campbell, J.M., Cebra, Daniel A., Chakaberia, Irakli, Chaloupka, Petr, Chang, Z., Chankova-Bunzarova, N., Chatterjee, A., Chattopadhyay, S., Chen, J.H., Chen, X., Cheng, J., Cherney, Michael Gerard, Christie, William, Contin, Giacomo, Crawford, Henry J., Dedovič, Tatiana G., Deng, J., Deppner, Ingo Martin, Derevschikov, Anatoly A., Didenko, Lidia, Dilks, Christopher, Dong, X., Drachenberg, James Lucus, Draper, James E., Dunlop, James C., Efimov, Leonid G., Elsey, Nicholas, Engelage, Jon M., Eppley, Geary Wareham, Esha, Roli, Esumi, ShinIchi, Evdokimov, Olga Y., Ewigleben, Justin, Eyser, Kjeld Oleg, Fatemi, Renee H., Fazio, Salvatore, Federič, Pavol, Federicova, P., Fedorišin, Jan, Feng, Z., Filip, Peter, Finch, Evan, Fisyak, Yuri V., Flores, C.E., Fujita, J., Fulek, Łukasz, Gagliardi, Carl A., Geurts, Frank, Gibson, Adam, Girard, M., Grosnick, David P., Gunarathne, D.S., Guo, Y., Gupta, Anik, Guryn, Włodzimierz, Hamad, Ayman, Hamed, Ahmed M., Harlenderova, Alena, Harris, John W., He, L., Heppelmann, Steven Francis, Herrmann, Norbert, Hirsch, Andrew S., Horvat, S., Huang, X., Huang, H.Z., Huang, T., Huang, B., Humanic, Thomas J., Huo, P., Igo, George J., Jacobs, William W., Jentsch, Alexander, Jia, J., Jiang, K., Jowzaee, S., Judd, Eleanor G., Kabana, Sonia, Kalinkin, Dmitry, Kang, K., Kapukchyan, David, Kauder, Kolja, Ke, Hongwei, Keane, Declan, Kechechyan, Armen, Khan, Z., Kikoła, Daniel P., Kim, C., Kisel, Ivan, Kisiel, Adam Ryszard, Kočenda, L. M., Kocmanek, M., Kollegger, Thorsten, Kosarzewski, Leszek Krzysztof, Kraishan, A.F., Krauth, L., Kravtsov, Peter, Krueger, Keith William, Kulathunga, Nalinda, Kumar, Lokesh, Kvapil, Jakub, Kwasizur, Joseph H., Lacey, Roy Alphanso, Landgraf, Jeffery M., Landry, K.D., Lauret, Jerome, Lebedev, Alexei, Lednicky, Richard, Lee, J.H., Li, W., Li, C., Li, Xiaomei, Li, Y., Lidrych, J., Lin, T., Lisa, Michael A., Liu, Y., Liu, H., Liu, F., Liu, P., Ljubicic, Tonko A., Llope, William Joseph, Lomnitz, Michael, Longacre, Ronald S., Luo, X., Luo, S., Ma, L., Ma, Yu-Gang, Ma, G.L., Ma, R., Magdy Abdelwahab Abdelrahman, Niseem, Majka, Richard Daniel, Mallick, Dukhishyam, Margetis, Spyridon, Markert, Christina, Matis, Howard S., Mayes, D., Meehan, Kathryn, Mei, Jincheng, Miller, Z.W., Minaev, Nikolai G., Mioduszewski, Saskia, Mishra, Debadeepti, Mizuno, S., Mohanty, Bedangadas, Mondal, Mriganka Mouli, Morozov, Dmitry A., Mustafa, M.K., Nasim, Md., Nayak, Tapan Kumar, Nelson, John M., Nemes, Daniel B., Nie, Maowu, Nigmatkulov, Grigory A., Niida, Takafumi, Nogach, Larisa V., Nonaka, Toshihiro, Nurušev, Sandibek B., Odyniec, Grazyna Janina, Ogawa, Akio, Oh, Kunsu, Okorokov, Vitaly A., Olvitt, D., Page, Brian S., Pak, Robert, Pandit, Y., Panebratsev, Yuri, Pawlik, Bogdan, Pei, Hua, Perkins, Chris, Pluta, Jan Marian, Poniatowska, K., Porter, Jeffrey Brent, Posik, Matthew, Pruthi, Navneet Kumar, Przybycien, Mariusz, Putschke, Jörn H., Quintero, Amilkar, Ramachandran, Suvarna, Ray, Robert L., Reed, Rosi Jan, Rehbein, M.J., Ritter, Hans Georg, Roberts, Jabus B., Rogačevskij, Oleg V., Romero, Juan L., Roth, J.D., Ruan, Lijuan, Rusnak, Jan, Rusnakova, Olga, Sahoo, Nihar Ranjan, Sahu, Pradip Kumar, Salur, Sevil, Sandweiss, Jack H., Saur, M., Schambach, Joachim, Schmah, Alexander, Schmidke, William B., Schmitz, Norbert, Schweid, Benjamin R., Seger, Janet Elizabeth, Sergeeva, Maria, Seto, Richard, Seyboth, Peter, Shah, N., Shahaliev, Ehtiram, Shanmuganathan, Prashanth V., Shao, M., Shen, W.Q., Shi, S.S., Shi, Z., Shou, Q.Y., Sichtermann, Ernst P., Sikora, Rafał, Šimko, Miroslav, Singha, Subhash, Skoby, M.J., Smirnov, Nikolai, Smirnov, Dmitri V., Solyst, William, Sorensen, Paul Richard, Spinka, Harold. M., Srivastava, Brijesh Kumar, Stanislaus, T. D. Shirvel, Stewart, David J., Strichanov, Michail Nikolaevič, Stringfellow, Blair, Suaide, Alexandre Alarcon do Passo, Sugiura, Tetsuro, Šumbera, Michal, Summa, Branden, Sun, X., Sun, X.M., Sun, Y., Surrow, Bernd, Svirida, Dmitry N., Tang, Zebo, Tang, Aihong, Taranenko, Arkadiy, Tarnowsky, Terence J., Tawfik, Abdel Nasser, Thäder, Jochen, Thomas, James H., Timmins, Anthony Robert, Tlusty, David, Todoroki, Takahito, Tokarev, Mikhail V., Trentalange, Stephen, Tribble, Robert E., Tribedy, Prithwish, Tripathy, Srikanta Kumar, Trzeciak, Barbara Antonina, Tsai, Oleg D., Tu, B., Ullrich, Thomas, Underwood, David G., Upsal, Isaac, Van Buren, Gene, Nieuwenhuizen, Gerrit J. van, Vasiliev, Alexander Nikolaevich, Videbæk, Flemming, Vokal, Stanislav, Voloshin, Sergei, Vossen, A., Wang, G., Wang, Y., Wang, F., Webb, Grant, Webb, Jason C., Wen, L., Westfall, Gary D., Wieman, Howard, Wissink, Scott W., Witt, Richard, Wu, Y., Xiao, Z.G., Xie, G., Xie, W., Xu, N., Xu, Y.F., Xu, Q.H., Xu, Z., Yang, Y., Yang, C., Yang, S., Yang, Q., Ye, Z., Yi, L., Yip, K., Yoo, In-Kwon, Zbroszczyk, Hanna Paulina, Zha, W., Zhang, J.B., Zhang, J., Zhang, S., Zhang, Zuman, Zhang, Y., Zhang, L., Zhang, X.P., Zhao, J., Zhong, C., Zhou, C., Zhou, L., Zhu, X., Zhu, Z., Zyzak, Maksym, Adamczyk, Leszek, Adams, Joseph R., Adkins, J. Kevin, Agakishiev, Geydar, Aggarwal, Madan Mohan, Ahammed, Zubayer, Ajitanand, N.N., Alekseev, Igor G., Anderson, Derek M., Aoyama, Ryo, Aparin, Alexey, Arkhipkin, Dmitry A., Aschenauer, Elke Caroline, Ashraf, Muhammad Usman, Attri, Anjali, Averichev, Georgy S., Bairathi, Vipul, Barish, Kenneth, Behera, Arabinda, Bellwied, Rene, Bhasin, Anju, Bhati, Ashok Kumar, Bhattarai, P., Bielčík, Jaroslav, Bielčíková, Jana, Bland, Leslie C., Bordyuzhin, Igor G., Bouchet, Jonathan, Brandenburg, James D., Brandin, Andrei V., Brown, D., Bryslawskyj, Jason, Bunzarov, Ivan, Butterworth, Joseph, Caines, Helen Louise, Calderón de la Barca Sánchez, Manuel, Campbell, J.M., Cebra, Daniel A., Chakaberia, Irakli, Chaloupka, Petr, Chang, Z., Chankova-Bunzarova, N., Chatterjee, A., Chattopadhyay, S., Chen, J.H., Chen, X., Cheng, J., Cherney, Michael Gerard, Christie, William, Contin, Giacomo, Crawford, Henry J., Dedovič, Tatiana G., Deng, J., Deppner, Ingo Martin, Derevschikov, Anatoly A., Didenko, Lidia, Dilks, Christopher, Dong, X., Drachenberg, James Lucus, Draper, James E., Dunlop, James C., Efimov, Leonid G., Elsey, Nicholas, Engelage, Jon M., Eppley, Geary Wareham, Esha, Roli, Esumi, ShinIchi, Evdokimov, Olga Y., Ewigleben, Justin, Eyser, Kjeld Oleg, Fatemi, Renee H., Fazio, Salvatore, Federič, Pavol, Federicova, P., Fedorišin, Jan, Feng, Z., Filip, Peter, Finch, Evan, Fisyak, Yuri V., Flores, C.E., Fujita, J., Fulek, Łukasz, Gagliardi, Carl A., Geurts, Frank, Gibson, Adam, Girard, M., Grosnick, David P., Gunarathne, D.S., Guo, Y., Gupta, Anik, Guryn, Włodzimierz, Hamad, Ayman, Hamed, Ahmed M., Harlenderova, Alena, Harris, John W., He, L., Heppelmann, Steven Francis, Herrmann, Norbert, Hirsch, Andrew S., Horvat, S., Huang, X., Huang, H.Z., Huang, T., Huang, B., Humanic, Thomas J., Huo, P., Igo, George J., Jacobs, William W., Jentsch, Alexander, Jia, J., Jiang, K., Jowzaee, S., Judd, Eleanor G., Kabana, Sonia, Kalinkin, Dmitry, Kang, K., Kapukchyan, David, Kauder, Kolja, Ke, Hongwei, Keane, Declan, Kechechyan, Armen, Khan, Z., Kikoła, Daniel P., Kim, C., Kisel, Ivan, Kisiel, Adam Ryszard, Kočenda, L. M., Kocmanek, M., Kollegger, Thorsten, Kosarzewski, Leszek Krzysztof, Kraishan, A.F., Krauth, L., Kravtsov, Peter, Krueger, Keith William, Kulathunga, Nalinda, Kumar, Lokesh, Kvapil, Jakub, Kwasizur, Joseph H., Lacey, Roy Alphanso, Landgraf, Jeffery M., Landry, K.D., Lauret, Jerome, Lebedev, Alexei, Lednicky, Richard, Lee, J.H., Li, W., Li, C., Li, Xiaomei, Li, Y., Lidrych, J., Lin, T., Lisa, Michael A., Liu, Y., Liu, H., Liu, F., Liu, P., Ljubicic, Tonko A., Llope, William Joseph, Lomnitz, Michael, Longacre, Ronald S., Luo, X., Luo, S., Ma, L., Ma, Yu-Gang, Ma, G.L., Ma, R., Magdy Abdelwahab Abdelrahman, Niseem, Majka, Richard Daniel, Mallick, Dukhishyam, Margetis, Spyridon, Markert, Christina, Matis, Howard S., Mayes, D., Meehan, Kathryn, Mei, Jincheng, Miller, Z.W., Minaev, Nikolai G., Mioduszewski, Saskia, Mishra, Debadeepti, Mizuno, S., Mohanty, Bedangadas, Mondal, Mriganka Mouli, Morozov, Dmitry A., Mustafa, M.K., Nasim, Md., Nayak, Tapan Kumar, Nelson, John M., Nemes, Daniel B., Nie, Maowu, Nigmatkulov, Grigory A., Niida, Takafumi, Nogach, Larisa V., Nonaka, Toshihiro, Nurušev, Sandibek B., Odyniec, Grazyna Janina, Ogawa, Akio, Oh, Kunsu, Okorokov, Vitaly A., Olvitt, D., Page, Brian S., Pak, Robert, Pandit, Y., Panebratsev, Yuri, Pawlik, Bogdan, Pei, Hua, Perkins, Chris, Pluta, Jan Marian, Poniatowska, K., Porter, Jeffrey Brent, Posik, Matthew, Pruthi, Navneet Kumar, Przybycien, Mariusz, Putschke, Jörn H., Quintero, Amilkar, Ramachandran, Suvarna, Ray, Robert L., Reed, Rosi Jan, Rehbein, M.J., Ritter, Hans Georg, Roberts, Jabus B., Rogačevskij, Oleg V., Romero, Juan L., Roth, J.D., Ruan, Lijuan, Rusnak, Jan, Rusnakova, Olga, Sahoo, Nihar Ranjan, Sahu, Pradip Kumar, Salur, Sevil, Sandweiss, Jack H., Saur, M., Schambach, Joachim, Schmah, Alexander, Schmidke, William B., Schmitz, Norbert, Schweid, Benjamin R., Seger, Janet Elizabeth, Sergeeva, Maria, Seto, Richard, Seyboth, Peter, Shah, N., Shahaliev, Ehtiram, Shanmuganathan, Prashanth V., Shao, M., Shen, W.Q., Shi, S.S., Shi, Z., Shou, Q.Y., Sichtermann, Ernst P., Sikora, Rafał, Šimko, Miroslav, Singha, Subhash, Skoby, M.J., Smirnov, Nikolai, Smirnov, Dmitri V., Solyst, William, Sorensen, Paul Richard, Spinka, Harold. M., Srivastava, Brijesh Kumar, Stanislaus, T. D. Shirvel, Stewart, David J., Strichanov, Michail Nikolaevič, Stringfellow, Blair, Suaide, Alexandre Alarcon do Passo, Sugiura, Tetsuro, Šumbera, Michal, Summa, Branden, Sun, X., Sun, X.M., Sun, Y., Surrow, Bernd, Svirida, Dmitry N., Tang, Zebo, Tang, Aihong, Taranenko, Arkadiy, Tarnowsky, Terence J., Tawfik, Abdel Nasser, Thäder, Jochen, Thomas, James H., Timmins, Anthony Robert, Tlusty, David, Todoroki, Takahito, Tokarev, Mikhail V., Trentalange, Stephen, Tribble, Robert E., Tribedy, Prithwish, Tripathy, Srikanta Kumar, Trzeciak, Barbara Antonina, Tsai, Oleg D., Tu, B., Ullrich, Thomas, Underwood, David G., Upsal, Isaac, Van Buren, Gene, Nieuwenhuizen, Gerrit J. van, Vasiliev, Alexander Nikolaevich, Videbæk, Flemming, Vokal, Stanislav, Voloshin, Sergei, Vossen, A., Wang, G., Wang, Y., Wang, F., Webb, Grant, Webb, Jason C., Wen, L., Westfall, Gary D., Wieman, Howard, Wissink, Scott W., Witt, Richard, Wu, Y., Xiao, Z.G., Xie, G., Xie, W., Xu, N., Xu, Y.F., Xu, Q.H., Xu, Z., Yang, Y., Yang, C., Yang, S., Yang, Q., Ye, Z., Yi, L., Yip, K., Yoo, In-Kwon, Zbroszczyk, Hanna Paulina, Zha, W., Zhang, J.B., Zhang, J., Zhang, S., Zhang, Zuman, Zhang, Y., Zhang, L., Zhang, X.P., Zhao, J., Zhong, C., Zhou, C., Zhou, L., Zhu, X., Zhu, Z., and Zyzak, Maksym

Abstract

The transversity distribution, which describes transversely polarized quarks in transversely polarized nucleons, is a fundamental component of the spin structure of the nucleon, and is only loosely constrained by global fits to existing semi-inclusive deep inelastic scattering (SIDIS) data. In transversely polarized p↑+p collisions it can be accessed using transverse polarization dependent fragmentation functions which give rise to azimuthal correlations between the polarization of the struck parton and the final state scalar mesons.This letter reports on spin dependent di-hadron correlations measured by the STAR experiment. The new dataset corresponds to 25 pb−1 integrated luminosity of p↑+p collisions at s=500 GeV, an increase of more than a factor of ten compared to our previous measurement at s=200 GeV. Non-zero asymmetries sensitive to transversity are observed at a Q2 of several hundred GeV and are found to be consistent with the former measurement and a model calculation. We expect that these data will enable an extraction of transversity with comparable precision to current SIDIS datasets but at much higher momentum transfers where subleading effects are suppressed.

Published
2018

7. Beam energy dependence of rapidity-even dipolar flow in Au+Au collisions

Author

Adam, Jaroslav, Adamczyk, Leszek, Adams, Joseph R., Adkins, J. Kevin, Agakishiev, Geydar, Aggarwal, Madan Mohan, Ahammed, Zubayer, Ajitanand, N.N., Alekseev, Igor G., Anderson, Derek M., Aoyama, Ryo, Aparin, Alexey, Arkhipkin, Dmitry A., Aschenauer, Elke Caroline, Ashraf, Muhammad Usman, Atetalla, Fareha, Attri, Anjali, Averichev, Georgy S., Bai, Xiaozhi, Bairathi, Vipul, Barish, Kenneth, Bassill, Aaron J., Behera, Arabinda, Bellwied, Rene, Bhasin, Anju, Bhati, Ashok Kumar, Bielčík, Jaroslav, Bielčíková, Jana, Bland, Leslie C., Bordyuzhin, Igor G., Brandenburg, James D., Brandin, Andrei V., Brown, D., Bryslawskyj, Jason, Bunzarov, Ivan, Butterworth, Joseph, Caines, Helen Louise, Calderón de la Barca Sánchez, Manuel, Campbell, J.M., Cebra, Daniel A., Chakaberia, Irakli, Chaloupka, Petr, Chang, F.-H., Chang, Z., Chankova-Bunzarova, N., Chatterjee, A., Chattopadhyay, S., Chen, J.H., Chen, X., Cheng, J., Cherney, Michael Gerard, Christie, William, Contin, Giacomo, Crawford, Henry J., Das, Supriya, Dedovič, Tatiana G., Deppner, Ingo Martin, Derevschikov, Anatoly A., Didenko, Lidia, Dilks, Christopher, Dong, X., Drachenberg, James Lucus, Dunlop, James C., Efimov, Leonid G., Elsey, Nicholas, Engelage, Jon M., Eppley, Geary Wareham, Esha, Roli, Esumi, ShinIchi, Evdokimov, Olga Y., Ewigleben, Justin, Eyser, Kjeld Oleg, Fatemi, Renee H., Fazio, Salvatore, Federič, Pavol, Federicova, P., Fedorišin, Jan, Filip, Peter, Finch, Evan, Fisyak, Yuri V., Flores, C.E., Fulek, Łukasz, Gagliardi, Carl A., Galatyuk, Tetyana, Geurts, Frank, Gibson, Adam, Grosnick, David P., Gunarathne, D.S., Guo, Y., Gupta, Anik, Guryn, Włodzimierz, Hamad, Ayman, Hamed, Ahmed M., Harlenderova, Alena, Harris, John W., He, L., Heppelmann, Steven Francis, Herrmann, Norbert, Hirsch, Andrew S., Holub, Lukáš, Horvat, S., Huang, X., Huang, B., Huang, Shengli, Huang, H.Z., Huang, T., Humanic, Thomas J., Huo, P., Igo, George J., Jacobs, William W., Jentsch, Alexander, Jia, J., Jiang, K., Jowzaee, S., Judd, Eleanor G., Kabana, Sonia, Kalinkin, Dmitry, Kang, K., Kapukchyan, David, Kauder, Kolja, Ke, Hongwei, Keane, Declan, Kechechyan, Armen, Kikoła, Daniel P., Kim, C., Kinghorn, Todd Adler, Kisel, Ivan, Kisiel, Adam Ryszard, Kočenda, L. M., Kosarzewski, Leszek Krzysztof, Kraishan, A.F., Kramárik, Lukáš, Krauth, L., Kravtsov, Peter, Krueger, Keith William, Kulathunga, Nalinda, Kumar, Shyam, Kumar, Lokesh, Kvapil, Jakub, Kwasizur, Joseph H., Lacey, Roy Alphanso, Landgraf, Jeffery M., Lauret, Jerome, Lebedev, Alexei, Lednicky, Richard, Lee, J.H., Li, Xiaomei, Li, C., Li, W., Li, Y., Liang, Y., Lidrych, J., Lin, T., Lipiec, Andrzej, Lisa, Michael A., Liu, F., Liu, P., Liu, H., Liu, Y., Ljubicic, Tonko A., Llope, William Joseph, Lomnitz, Michael, Longacre, Ronald S., Luo, X., Luo, S., Ma, G.L., Ma, Yu-Gang, Ma, L., Ma, R., Magdy Abdelwahab Abdelrahman, Niseem, Majka, Richard Daniel, Mallick, Dukhishyam, Margetis, Spyridon, Markert, Christina, Matis, Howard S., Matonoha, Oliver, Mayes, D., Mazer, Joel Anthony, Meehan, Kathryn, Mei, Jincheng, Minaev, Nikolai G., Mioduszewski, Saskia, Mishra, Debadeepti, Mohanty, Bedangadas, Mondal, Mriganka Mouli, Mooney, Isaac A., Morozov, Dmitry A., Nasim, Md., Negrete, J.D., Nelson, John M., Nemes, Daniel B., Nie, Maowu, Nigmatkulov, Grigory A., Niida, Takafumi, Nogach, Larisa V., Nonaka, Toshihiro, Nurušev, Sandibek B., Odyniec, Grazyna Janina, Ogawa, Akio, Oh, Kunsu, Oh, S., Okorokov, Vitaly A., Olvitt, D., Page, Brian S., Pak, Robert, Panebratsev, Yuri, Pawlik, Bogdan, Pei, Hua, Perkins, Chris, Pluta, Jan Marian, Porter, Jeffrey Brent, Posik, Matthew, Pruthi, Navneet Kumar, Przybycien, Mariusz, Putschke, Jörn H., Quintero, Amilkar, Radhakrishnan, Sooraj Krishnan, Ramachandran, Suvarna, Ray, Robert L., Reed, Rosi Jan, Ritter, Hans Georg, Roberts, Jabus B., Rogačevskij, Oleg V., Romero, Juan L., Ruan, Lijuan, Rusnak, Jan, Rusnakova, Olga, Sahoo, Nihar Ranjan, Sahu, Pradip Kumar, Salur, Sevil, Sandweiss, Jack H., Schambach, Joachim, Schmah, Alexander, Schmidke, William B., Schmitz, Norbert, Schweid, Benjamin R., Seck, Florian, Seger, Janet Elizabeth, Sergeeva, Maria, Seto, Richard, Seyboth, Peter, Shah, N., Shahaliev, Ehtiram, Shanmuganathan, Prashanth V., Shao, M., Shen, W.Q., Shen, F., Shi, S.S., Shou, Q.Y., Sichtermann, Ernst P., Siejka, Sebastian, Sikora, Rafał, Šimko, Miroslav, Singha, Subhash, Smirnov, Nikolai, Smirnov, Dmitri V., Solyst, William, Sorensen, Paul Richard, Spinka, Harold. M., Srivastava, Brijesh Kumar, Stanislaus, T. D. Shirvel, Stewart, David J., Strichanov, Michail Nikolaevič, Stringfellow, Blair, Suaide, Alexandre Alarcon do Passo, Sugiura, Tetsuro, Šumbera, Michal, Summa, Branden, Sun, Y., Sun, X., Sun, X.M., Surrow, Bernd, Svirida, Dmitry N., Szymański, Paweł, Tang, Zebo, Tang, Aihong, Taranenko, Arkadiy, Tarnowsky, Terence J., Thomas, James H., Timmins, Anthony Robert, Tlusty, David, Todoroki, Takahito, Tokarev, Mikhail V., Tomkiel, Catherine A., Trentalange, Stephen, Tribble, Robert E., Tribedy, Prithwish, Tripathy, Srikanta Kumar, Tsai, Oleg D., Tu, B., Ullrich, Thomas, Underwood, David G., Upsal, Isaac, Van Buren, Gene, Vanek, Jan, Vasiliev, Alexander Nikolaevich, Vassiliev, Iouri, Videbæk, Flemming, Vokal, Stanislav, Voloshin, Sergei, Vossen, A., Wang, G., Wang, Y., Wang, F., Webb, Jason C., Wen, L., Westfall, Gary D., Wieman, Howard, Wissink, Scott W., Witt, Richard, Wu, Y., Xiao, Z.G., Xie, G., Xie, W., Xu, Q.H., Xu, Z., Xu, J., Xu, Y.F., Xu, N., Yang, S., Yang, C., Yang, Q., Yang, Y., Ye, Z., Yi, L., Yip, K., Yoo, In-Kwon, Yu, N., Zbroszczyk, Hanna Paulina, Zha, W., Zhang, Zuman, Zhang, L., Zhang, Y., Zhang, X.P., Zhang, J., Zhang, S., Zhao, J., Zhong, C., Zhou, C., Zhou, L., Zhu, Z., Zhu, X., Zyzak, Maksym, Adam, Jaroslav, Adamczyk, Leszek, Adams, Joseph R., Adkins, J. Kevin, Agakishiev, Geydar, Aggarwal, Madan Mohan, Ahammed, Zubayer, Ajitanand, N.N., Alekseev, Igor G., Anderson, Derek M., Aoyama, Ryo, Aparin, Alexey, Arkhipkin, Dmitry A., Aschenauer, Elke Caroline, Ashraf, Muhammad Usman, Atetalla, Fareha, Attri, Anjali, Averichev, Georgy S., Bai, Xiaozhi, Bairathi, Vipul, Barish, Kenneth, Bassill, Aaron J., Behera, Arabinda, Bellwied, Rene, Bhasin, Anju, Bhati, Ashok Kumar, Bielčík, Jaroslav, Bielčíková, Jana, Bland, Leslie C., Bordyuzhin, Igor G., Brandenburg, James D., Brandin, Andrei V., Brown, D., Bryslawskyj, Jason, Bunzarov, Ivan, Butterworth, Joseph, Caines, Helen Louise, Calderón de la Barca Sánchez, Manuel, Campbell, J.M., Cebra, Daniel A., Chakaberia, Irakli, Chaloupka, Petr, Chang, F.-H., Chang, Z., Chankova-Bunzarova, N., Chatterjee, A., Chattopadhyay, S., Chen, J.H., Chen, X., Cheng, J., Cherney, Michael Gerard, Christie, William, Contin, Giacomo, Crawford, Henry J., Das, Supriya, Dedovič, Tatiana G., Deppner, Ingo Martin, Derevschikov, Anatoly A., Didenko, Lidia, Dilks, Christopher, Dong, X., Drachenberg, James Lucus, Dunlop, James C., Efimov, Leonid G., Elsey, Nicholas, Engelage, Jon M., Eppley, Geary Wareham, Esha, Roli, Esumi, ShinIchi, Evdokimov, Olga Y., Ewigleben, Justin, Eyser, Kjeld Oleg, Fatemi, Renee H., Fazio, Salvatore, Federič, Pavol, Federicova, P., Fedorišin, Jan, Filip, Peter, Finch, Evan, Fisyak, Yuri V., Flores, C.E., Fulek, Łukasz, Gagliardi, Carl A., Galatyuk, Tetyana, Geurts, Frank, Gibson, Adam, Grosnick, David P., Gunarathne, D.S., Guo, Y., Gupta, Anik, Guryn, Włodzimierz, Hamad, Ayman, Hamed, Ahmed M., Harlenderova, Alena, Harris, John W., He, L., Heppelmann, Steven Francis, Herrmann, Norbert, Hirsch, Andrew S., Holub, Lukáš, Horvat, S., Huang, X., Huang, B., Huang, Shengli, Huang, H.Z., Huang, T., Humanic, Thomas J., Huo, P., Igo, George J., Jacobs, William W., Jentsch, Alexander, Jia, J., Jiang, K., Jowzaee, S., Judd, Eleanor G., Kabana, Sonia, Kalinkin, Dmitry, Kang, K., Kapukchyan, David, Kauder, Kolja, Ke, Hongwei, Keane, Declan, Kechechyan, Armen, Kikoła, Daniel P., Kim, C., Kinghorn, Todd Adler, Kisel, Ivan, Kisiel, Adam Ryszard, Kočenda, L. M., Kosarzewski, Leszek Krzysztof, Kraishan, A.F., Kramárik, Lukáš, Krauth, L., Kravtsov, Peter, Krueger, Keith William, Kulathunga, Nalinda, Kumar, Shyam, Kumar, Lokesh, Kvapil, Jakub, Kwasizur, Joseph H., Lacey, Roy Alphanso, Landgraf, Jeffery M., Lauret, Jerome, Lebedev, Alexei, Lednicky, Richard, Lee, J.H., Li, Xiaomei, Li, C., Li, W., Li, Y., Liang, Y., Lidrych, J., Lin, T., Lipiec, Andrzej, Lisa, Michael A., Liu, F., Liu, P., Liu, H., Liu, Y., Ljubicic, Tonko A., Llope, William Joseph, Lomnitz, Michael, Longacre, Ronald S., Luo, X., Luo, S., Ma, G.L., Ma, Yu-Gang, Ma, L., Ma, R., Magdy Abdelwahab Abdelrahman, Niseem, Majka, Richard Daniel, Mallick, Dukhishyam, Margetis, Spyridon, Markert, Christina, Matis, Howard S., Matonoha, Oliver, Mayes, D., Mazer, Joel Anthony, Meehan, Kathryn, Mei, Jincheng, Minaev, Nikolai G., Mioduszewski, Saskia, Mishra, Debadeepti, Mohanty, Bedangadas, Mondal, Mriganka Mouli, Mooney, Isaac A., Morozov, Dmitry A., Nasim, Md., Negrete, J.D., Nelson, John M., Nemes, Daniel B., Nie, Maowu, Nigmatkulov, Grigory A., Niida, Takafumi, Nogach, Larisa V., Nonaka, Toshihiro, Nurušev, Sandibek B., Odyniec, Grazyna Janina, Ogawa, Akio, Oh, Kunsu, Oh, S., Okorokov, Vitaly A., Olvitt, D., Page, Brian S., Pak, Robert, Panebratsev, Yuri, Pawlik, Bogdan, Pei, Hua, Perkins, Chris, Pluta, Jan Marian, Porter, Jeffrey Brent, Posik, Matthew, Pruthi, Navneet Kumar, Przybycien, Mariusz, Putschke, Jörn H., Quintero, Amilkar, Radhakrishnan, Sooraj Krishnan, Ramachandran, Suvarna, Ray, Robert L., Reed, Rosi Jan, Ritter, Hans Georg, Roberts, Jabus B., Rogačevskij, Oleg V., Romero, Juan L., Ruan, Lijuan, Rusnak, Jan, Rusnakova, Olga, Sahoo, Nihar Ranjan, Sahu, Pradip Kumar, Salur, Sevil, Sandweiss, Jack H., Schambach, Joachim, Schmah, Alexander, Schmidke, William B., Schmitz, Norbert, Schweid, Benjamin R., Seck, Florian, Seger, Janet Elizabeth, Sergeeva, Maria, Seto, Richard, Seyboth, Peter, Shah, N., Shahaliev, Ehtiram, Shanmuganathan, Prashanth V., Shao, M., Shen, W.Q., Shen, F., Shi, S.S., Shou, Q.Y., Sichtermann, Ernst P., Siejka, Sebastian, Sikora, Rafał, Šimko, Miroslav, Singha, Subhash, Smirnov, Nikolai, Smirnov, Dmitri V., Solyst, William, Sorensen, Paul Richard, Spinka, Harold. M., Srivastava, Brijesh Kumar, Stanislaus, T. D. Shirvel, Stewart, David J., Strichanov, Michail Nikolaevič, Stringfellow, Blair, Suaide, Alexandre Alarcon do Passo, Sugiura, Tetsuro, Šumbera, Michal, Summa, Branden, Sun, Y., Sun, X., Sun, X.M., Surrow, Bernd, Svirida, Dmitry N., Szymański, Paweł, Tang, Zebo, Tang, Aihong, Taranenko, Arkadiy, Tarnowsky, Terence J., Thomas, James H., Timmins, Anthony Robert, Tlusty, David, Todoroki, Takahito, Tokarev, Mikhail V., Tomkiel, Catherine A., Trentalange, Stephen, Tribble, Robert E., Tribedy, Prithwish, Tripathy, Srikanta Kumar, Tsai, Oleg D., Tu, B., Ullrich, Thomas, Underwood, David G., Upsal, Isaac, Van Buren, Gene, Vanek, Jan, Vasiliev, Alexander Nikolaevich, Vassiliev, Iouri, Videbæk, Flemming, Vokal, Stanislav, Voloshin, Sergei, Vossen, A., Wang, G., Wang, Y., Wang, F., Webb, Jason C., Wen, L., Westfall, Gary D., Wieman, Howard, Wissink, Scott W., Witt, Richard, Wu, Y., Xiao, Z.G., Xie, G., Xie, W., Xu, Q.H., Xu, Z., Xu, J., Xu, Y.F., Xu, N., Yang, S., Yang, C., Yang, Q., Yang, Y., Ye, Z., Yi, L., Yip, K., Yoo, In-Kwon, Yu, N., Zbroszczyk, Hanna Paulina, Zha, W., Zhang, Zuman, Zhang, L., Zhang, Y., Zhang, X.P., Zhang, J., Zhang, S., Zhao, J., Zhong, C., Zhou, C., Zhou, L., Zhu, Z., Zhu, X., and Zyzak, Maksym

Abstract

New measurements of directed flow for charged hadrons, characterized by the Fourier coefficient v1, are presented for transverse momenta pT, and centrality intervals in Au+Au collisions recorded by the STAR experiment for the center-of-mass energy range √sN N = 7.7–200 GeV. The measurements underscore the importance of momentum conservation, and the characteristic dependencies on √sN N , centrality and pT are consistent with the expectations of geometric fluctuations generated in the initial stages of the collision, acting in concert with a hydrodynamic-like expansion. The centrality and pT dependencies of veven 1 , as well as an observed similarity between its excitation function and that for v3, could serve as constraints for initial-state models. The veven 1 excitation function could also provide an important supplement to the flow measurements employed for precision extraction of the temperature dependence of the specific shear viscosity.

Published
2018

9. Direct virtual photon production in Au+Au collisions at √sNN = 200 GeV

Author

Adamczyk, Leszek, Adkins, J. Kevin, Agakishiev, Geydar, Aggarwal, Madan Mohan, Ahammed, Zubayer, Ajitanand, N.N., Alekseev, Igor G., Anderson, Derek M., Aoyama, Ryo, Aparin, Alexey, Arkhipkin, Dmitry A., Aschenauer, Elke Caroline, Ashraf, Muhammad Usman, Attri, Anjali, Averichev, Georgy S., Bai, Xiaozhi, Bairathi, Vipul, Behera, Arabinda, Bellwied, Rene, Bhasin, Anju, Bhati, Ashok Kumar, Bhattarai, P., Bielčík, Jaroslav, Bielčíková, Jana, Bland, Leslie C., Bordyuzhin, Igor G., Bouchet, Jonathan, Brandenburg, James D., Brandin, Andrei V., Brown, D., Bunzarov, Ivan, Butterworth, Joseph, Caines, Helen Louise, Calderón de la Barca Sánchez, Manuel, Campbell, J.M., Cebra, Daniel A., Chakaberia, Irakli, Chaloupka, Petr, Chang, Z., Chankova-Bunzarova, N., Chatterjee, A., Chattopadhyay, S., Chen, X., Chen, J.H., Cheng, J., Cherney, Michael Gerard, Christie, William, Contin, Giacomo, Crawford, Henry J., Das, Supriya, De Silva, L.C., Debbe, R.R., Dedovič, Tatiana G., Deng, J., Derevschikov, Anatoly A., Didenko, Lidia, Dilks, Christopher, Dong, X., Drachenberg, James Lucus, Draper, James E., Dunkelberger, Lloyd Edward, Dunlop, James C., Efimov, Leonid G., Elsey, Nicholas, Engelage, Jon M., Eppley, Geary Wareham, Esha, Roli, Esumi, ShinIchi, Evdokimov, Olga Y., Ewigleben, Justin, Eyser, Kjeld Oleg, Fatemi, Renee H., Fazio, Salvatore, Federič, Pavol, Federicova, P., Fedorišin, Jan, Feng, Z., Filip, Peter, Finch, Evan, Fisyak, Yuri V., Flores, C.E., Fujita, J., Fulek, Łukasz, Gagliardi, Carl A., Garand, David, Geurts, Frank, Gibson, Adam, Girard, M., Grosnick, David P., Gunarathne, D.S., Guo, Y., Gupta, Anik, Gupta, S., Guryn, Włodzimierz, Hamad, Ayman, Hamed, Ahmed M., Harlenderova, Alena, Harris, John W., He, L., Heppelmann, Steven Francis, Hirsch, Andrew S., Hoffmann, Gerald W., Horvat, S., Huang, B., Huang, T., Huang, H.Z., Huang, X., Humanic, Thomas J., Huo, P., Igo, George J., Jacobs, William W., Jentsch, Alexander, Jia, J., Jiang, K., Jowzaee, S., Judd, Eleanor G., Kabana, Sonia, Kalinkin, Dmitry, Kang, K., Kauder, Kolja, Ke, Hongwei, Keane, Declan, Kechechyan, Armen, Khan, Z., Kikoła, Daniel P., Kisel, Ivan, Kisiel, Adam Ryszard, Kočenda, L. M., Kocmanek, M., Kollegger, Thorsten, Kosarzewski, Leszek Krzysztof, Kraishan, A.F., Kravtsov, Peter, Krueger, Keith William, Kulathunga, Nalinda, Kumar, Lokesh, Kvapil, Jakub, Kwasizur, Joseph H., Lacey, Roy Alphanso, Landgraf, Jeffery M., Landry, K.D., Lauret, Jerome, Lebedev, Alexei, Lednicky, Richard, Lee, J.H., Li, W., Li, Xiaomei, Li, C., Li, Y., Lidrych, J., Lin, T., Lisa, Michael A., Liu, Y., Liu, F., Liu, H., Liu, P., Ljubicic, Tonko A., Llope, William Joseph, Lomnitz, Michael, Longacre, Ronald S., Luo, S., Luo, X., Ma, G.L., Ma, Yu-Gang, Ma, L., Ma, R., Magdy Abdelwahab Abdelrahman, Niseem, Majka, Richard Daniel, Mallick, Dukhishyam, Margetis, Spyridon, Markert, Christina, Matis, Howard S., Meehan, Kathryn, Mei, Jincheng, Miller, Z.W., Minaev, Nikolai G., Mioduszewski, Saskia, Mishra, Debadeepti, Mizuno, S., Mohanty, Bedangadas, Mondal, Mriganka Mouli, Morozov, Dmitry A., Mustafa, M.K., Nasim, Md., Nayak, Tapan Kumar, Nelson, John M., Nie, Maowu, Nigmatkulov, Grigory A., Niida, Takafumi, Nogach, Larisa V., Nonaka, Toshihiro, Nurušev, Sandibek B., Odyniec, Grazyna Janina, Ogawa, Akio, Oh, Kunsu, Okorokov, Vitaly A., Olvitt, D., Page, Brian S., Pak, Robert, Pandit, Y., Panebratsev, Yuri, Pawlik, Bogdan, Pei, Hua, Perkins, Chris, Pile, P., Pluta, Jan Marian, Poniatowska, K., Porter, Jeffrey Brent, Posik, Matthew, Poskanzer, Arthur M., Pruthi, Navneet Kumar, Przybycien, Mariusz, Putschke, Jörn H., Qiu, H., Quintero, Amilkar, Ramachandran, Suvarna, Ray, Robert L., Reed, Rosi Jan, Rehbein, M.J., Ritter, Hans Georg, Roberts, Jabus B., Rogačevskij, Oleg V., Romero, Juan L., Roth, J.D., Ruan, Lijuan, Rusnak, Jan, Rusnakova, Olga, Sahoo, Nihar Ranjan, Sahu, Pradip Kumar, Salur, Sevil, Sandweiss, Jack H., Saur, M., Schambach, Joachim, Schmah, Alexander, Schmidke, William B., Schmitz, Norbert, Schweid, Benjamin R., Seger, Janet Elizabeth, Sergeeva, Maria, Seyboth, Peter, Shah, N., Shahaliev, Ehtiram, Shanmuganathan, Prashanth V., Shao, M., Sharma, A., Sharma, M.K., Shen, W.Q., Shi, Z., Shi, S.S., Shou, Q.Y., Sichtermann, Ernst P., Sikora, Rafał, Šimko, Miroslav, Singha, Subhash, Skoby, M.J., Smirnov, Nikolai, Smirnov, Dmitri V., Solyst, William, Song, L., Sorensen, Paul Richard, Spinka, Harold. M., Srivastava, Brijesh Kumar, Stanislaus, T. D. Shirvel, Strichanov, Michail Nikolaevič, Stringfellow, Blair, Sugiura, Tetsuro, Šumbera, Michal, Summa, Branden, Sun, Y., Sun, X.M., Sun, X., Surrow, Bernd, Svirida, Dmitry N., Tang, Aihong, Tang, Zebo, Taranenko, Arkadiy, Tarnowsky, Terence J., Tawfik, Abdel Nasser, Thäder, Jochen, Thomas, James H., Timmins, Anthony Robert, Tlusty, David, Todoroki, Takahito, Tokarev, Mikhail V., Trentalange, Stephen, Tribble, Robert E., Tribedy, Prithwish, Tripathy, Srikanta Kumar, Trzeciak, Barbara Antonina, Tsai, Oleg D., Ullrich, Thomas, Underwood, David G., Upsal, Isaac, Van Buren, Gene, Nieuwenhuizen, Gerrit J. van, Vasiliev, Alexander Nikolaevich, Videbæk, Flemming, Vokal, Stanislav, Voloshin, Sergei, Vossen, A., Wang, G., Wang, Y., Wang, F., Webb, Jason C., Webb, Grant, Wen, L., Westfall, Gary D., Wieman, Howard, Wissink, Scott W., Witt, Richard, Wu, Y., Xiao, Z.G., Xie, W., Xie, G., Xu, J., Xu, N., Xu, Q.H., Xu, Y.F., Xu, Z., Yang, Y., Yang, Q., Yang, C., Yang, S., Ye, Z., Yi, L., Yip, K., Yoo, In-Kwon, Yu, N., Zbroszczyk, Hanna Paulina, Zha, W., Zhang, Zuman, Zhang, X.P., Zhang, J.B., Zhang, S., Zhang, J., Zhang, Y., Zhao, J., Zhong, C., Zhou, L., Zhou, C., Zhu, X., Zhu, Z., Zyzak, Maksym, Adamczyk, Leszek, Adkins, J. Kevin, Agakishiev, Geydar, Aggarwal, Madan Mohan, Ahammed, Zubayer, Ajitanand, N.N., Alekseev, Igor G., Anderson, Derek M., Aoyama, Ryo, Aparin, Alexey, Arkhipkin, Dmitry A., Aschenauer, Elke Caroline, Ashraf, Muhammad Usman, Attri, Anjali, Averichev, Georgy S., Bai, Xiaozhi, Bairathi, Vipul, Behera, Arabinda, Bellwied, Rene, Bhasin, Anju, Bhati, Ashok Kumar, Bhattarai, P., Bielčík, Jaroslav, Bielčíková, Jana, Bland, Leslie C., Bordyuzhin, Igor G., Bouchet, Jonathan, Brandenburg, James D., Brandin, Andrei V., Brown, D., Bunzarov, Ivan, Butterworth, Joseph, Caines, Helen Louise, Calderón de la Barca Sánchez, Manuel, Campbell, J.M., Cebra, Daniel A., Chakaberia, Irakli, Chaloupka, Petr, Chang, Z., Chankova-Bunzarova, N., Chatterjee, A., Chattopadhyay, S., Chen, X., Chen, J.H., Cheng, J., Cherney, Michael Gerard, Christie, William, Contin, Giacomo, Crawford, Henry J., Das, Supriya, De Silva, L.C., Debbe, R.R., Dedovič, Tatiana G., Deng, J., Derevschikov, Anatoly A., Didenko, Lidia, Dilks, Christopher, Dong, X., Drachenberg, James Lucus, Draper, James E., Dunkelberger, Lloyd Edward, Dunlop, James C., Efimov, Leonid G., Elsey, Nicholas, Engelage, Jon M., Eppley, Geary Wareham, Esha, Roli, Esumi, ShinIchi, Evdokimov, Olga Y., Ewigleben, Justin, Eyser, Kjeld Oleg, Fatemi, Renee H., Fazio, Salvatore, Federič, Pavol, Federicova, P., Fedorišin, Jan, Feng, Z., Filip, Peter, Finch, Evan, Fisyak, Yuri V., Flores, C.E., Fujita, J., Fulek, Łukasz, Gagliardi, Carl A., Garand, David, Geurts, Frank, Gibson, Adam, Girard, M., Grosnick, David P., Gunarathne, D.S., Guo, Y., Gupta, Anik, Gupta, S., Guryn, Włodzimierz, Hamad, Ayman, Hamed, Ahmed M., Harlenderova, Alena, Harris, John W., He, L., Heppelmann, Steven Francis, Hirsch, Andrew S., Hoffmann, Gerald W., Horvat, S., Huang, B., Huang, T., Huang, H.Z., Huang, X., Humanic, Thomas J., Huo, P., Igo, George J., Jacobs, William W., Jentsch, Alexander, Jia, J., Jiang, K., Jowzaee, S., Judd, Eleanor G., Kabana, Sonia, Kalinkin, Dmitry, Kang, K., Kauder, Kolja, Ke, Hongwei, Keane, Declan, Kechechyan, Armen, Khan, Z., Kikoła, Daniel P., Kisel, Ivan, Kisiel, Adam Ryszard, Kočenda, L. M., Kocmanek, M., Kollegger, Thorsten, Kosarzewski, Leszek Krzysztof, Kraishan, A.F., Kravtsov, Peter, Krueger, Keith William, Kulathunga, Nalinda, Kumar, Lokesh, Kvapil, Jakub, Kwasizur, Joseph H., Lacey, Roy Alphanso, Landgraf, Jeffery M., Landry, K.D., Lauret, Jerome, Lebedev, Alexei, Lednicky, Richard, Lee, J.H., Li, W., Li, Xiaomei, Li, C., Li, Y., Lidrych, J., Lin, T., Lisa, Michael A., Liu, Y., Liu, F., Liu, H., Liu, P., Ljubicic, Tonko A., Llope, William Joseph, Lomnitz, Michael, Longacre, Ronald S., Luo, S., Luo, X., Ma, G.L., Ma, Yu-Gang, Ma, L., Ma, R., Magdy Abdelwahab Abdelrahman, Niseem, Majka, Richard Daniel, Mallick, Dukhishyam, Margetis, Spyridon, Markert, Christina, Matis, Howard S., Meehan, Kathryn, Mei, Jincheng, Miller, Z.W., Minaev, Nikolai G., Mioduszewski, Saskia, Mishra, Debadeepti, Mizuno, S., Mohanty, Bedangadas, Mondal, Mriganka Mouli, Morozov, Dmitry A., Mustafa, M.K., Nasim, Md., Nayak, Tapan Kumar, Nelson, John M., Nie, Maowu, Nigmatkulov, Grigory A., Niida, Takafumi, Nogach, Larisa V., Nonaka, Toshihiro, Nurušev, Sandibek B., Odyniec, Grazyna Janina, Ogawa, Akio, Oh, Kunsu, Okorokov, Vitaly A., Olvitt, D., Page, Brian S., Pak, Robert, Pandit, Y., Panebratsev, Yuri, Pawlik, Bogdan, Pei, Hua, Perkins, Chris, Pile, P., Pluta, Jan Marian, Poniatowska, K., Porter, Jeffrey Brent, Posik, Matthew, Poskanzer, Arthur M., Pruthi, Navneet Kumar, Przybycien, Mariusz, Putschke, Jörn H., Qiu, H., Quintero, Amilkar, Ramachandran, Suvarna, Ray, Robert L., Reed, Rosi Jan, Rehbein, M.J., Ritter, Hans Georg, Roberts, Jabus B., Rogačevskij, Oleg V., Romero, Juan L., Roth, J.D., Ruan, Lijuan, Rusnak, Jan, Rusnakova, Olga, Sahoo, Nihar Ranjan, Sahu, Pradip Kumar, Salur, Sevil, Sandweiss, Jack H., Saur, M., Schambach, Joachim, Schmah, Alexander, Schmidke, William B., Schmitz, Norbert, Schweid, Benjamin R., Seger, Janet Elizabeth, Sergeeva, Maria, Seyboth, Peter, Shah, N., Shahaliev, Ehtiram, Shanmuganathan, Prashanth V., Shao, M., Sharma, A., Sharma, M.K., Shen, W.Q., Shi, Z., Shi, S.S., Shou, Q.Y., Sichtermann, Ernst P., Sikora, Rafał, Šimko, Miroslav, Singha, Subhash, Skoby, M.J., Smirnov, Nikolai, Smirnov, Dmitri V., Solyst, William, Song, L., Sorensen, Paul Richard, Spinka, Harold. M., Srivastava, Brijesh Kumar, Stanislaus, T. D. Shirvel, Strichanov, Michail Nikolaevič, Stringfellow, Blair, Sugiura, Tetsuro, Šumbera, Michal, Summa, Branden, Sun, Y., Sun, X.M., Sun, X., Surrow, Bernd, Svirida, Dmitry N., Tang, Aihong, Tang, Zebo, Taranenko, Arkadiy, Tarnowsky, Terence J., Tawfik, Abdel Nasser, Thäder, Jochen, Thomas, James H., Timmins, Anthony Robert, Tlusty, David, Todoroki, Takahito, Tokarev, Mikhail V., Trentalange, Stephen, Tribble, Robert E., Tribedy, Prithwish, Tripathy, Srikanta Kumar, Trzeciak, Barbara Antonina, Tsai, Oleg D., Ullrich, Thomas, Underwood, David G., Upsal, Isaac, Van Buren, Gene, Nieuwenhuizen, Gerrit J. van, Vasiliev, Alexander Nikolaevich, Videbæk, Flemming, Vokal, Stanislav, Voloshin, Sergei, Vossen, A., Wang, G., Wang, Y., Wang, F., Webb, Jason C., Webb, Grant, Wen, L., Westfall, Gary D., Wieman, Howard, Wissink, Scott W., Witt, Richard, Wu, Y., Xiao, Z.G., Xie, W., Xie, G., Xu, J., Xu, N., Xu, Q.H., Xu, Y.F., Xu, Z., Yang, Y., Yang, Q., Yang, C., Yang, S., Ye, Z., Yi, L., Yip, K., Yoo, In-Kwon, Yu, N., Zbroszczyk, Hanna Paulina, Zha, W., Zhang, Zuman, Zhang, X.P., Zhang, J.B., Zhang, S., Zhang, J., Zhang, Y., Zhao, J., Zhong, C., Zhou, L., Zhou, C., Zhu, X., Zhu, Z., and Zyzak, Maksym

Abstract

We report the direct virtual photon invariant yields in the transverse momentum ranges 1 < pT < 3 GeV/c and 5 < pT < 10 GeV/c at mid-rapidity derived from the dielectron invariant mass continuum region 0.10 < Mee < 0.28 GeV/c2 for 0–80% minimum-bias Au+Au collisions at √sN N = 200 GeV. A clear excess in the invariant yield compared to the nuclear overlap function T A A scaled p + p reference is observed in the pT range 1 < pT < 3 GeV/c. For pT > 6 GeV/c the production follows T A A scaling. Model calculations with contributions from thermal radiation and initial hard parton scattering are consistent ithin uncertainties with the direct virtual photon invariant yield.

Published
2017

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