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1. Energy and system size dependence of phi meson production in Cu plus Cu and Au plus Au collisions

Author

ABELEV, BI, AGGARWAL, MM, AHAMMED, Z, ANDERSON, BD, ARKHIPKIN, D, AVERICHEV, GS, BAI, Y, BALEWSKI, J, BARANNIKOVA, O, BARNSBY, LS, BAUDOT, J, BAUMGART, S, BEAVIS, DR, BELLWIED, R, BENEDOSSO, F, BETANCOURT, MJ, BETTS, RR, BHARADWAJ, S, BHASIN, A, BHATI, AK, BICHSEL, H, BIELCIK, J, BIELCIKOVA, J, BIRITZ, B, BLAND, LC, BOMBARA, M, BONNER, BE, BOTJE, M, BOUCHET, J, BRAIDOT, E, BRANDIN, AV, BRUNA, E, BUELTMANN, S, BURTON, TP, BYSTERSKY, M, CAI, XZ, CAINES, H, SANCHEZ, MCD, CALLNER, J, CATU, O, CEBRA, D, CENDEJAS, R, CERVANTES, MC, CHAJECKI, Z, CHALOUPKA, P, CHATTOPADHYAY, S, CHEN, HF, CHEN, JH, CHEN, JY, CHENG, J, CHERNEY, M, CHIKANIAN, A, CHOI, KE, CHRISTIE, W, CHUNG, SU, CLARKE, RF, CODRINGTON, MJ, COFFIN, JP, CORLISS, R, CORMIER, TM, COSENTINO, MR, CRAMER, JG, CRAWFORD, HJ, DAS, D, DASH, S, DAUGHERITY, M, DE SILVA, C, DEDOVICH, TG, DEPHILLIPS, M, DEREVSCHIKOV, AA, DE SOUZA, RD, DIDENKO, L, DJAWOTHO, P, DOGRA, SM, DONG, X, DRACHENBERG, JL, DRAPER, JE, DU, F, DUNLOP, JC, MAZUMDAR, MRD, EDWARDS, WR, EFIMOV, LG, ELHALHULI, E, ELNIMR, M, EMELIANOV, V, ENGELAGE, J, EPPLEY, G, ERAZMUS, B, ESTIENNE, M, EUN, L, FACHINI, P, FATEMI, R, FEDORISIN, J, FENG, A, FILIP, P, FINCH, E, FINE, V, FISYAK, Y, GAGLIARDI, CA, GAILLARD, L, GANGADHARAN, DR, GANTI, MS, GARCIA-SOLIS, E, GHAZIKHANIAN, V, GHOSH, P, GORBUNOV, YN, GORDON, A, GREBENYUK, O, GROSNICK, D, GRUBE, B, GUERTIN, SM, GUIMARAES, KSFF, GUPTA, A, GUPTA, N, GURYN, W, HAAG, B, HALLMAN, TJ, HAMED, A, HARRIS, JW, HE, W, HEINZ, M, HEPPLEMANN, S, HIPPOLYTE, B, HIRSCH, A, HJORT, E, HOFFMAN, AM, HOFFMANN, GW, HOFMAN, DJ, HOLLIS, RS, HUANG, HZ, HUMANIC, TJ, IGO, G, IORDANOVA, A, JACOBS, P, JACOBS, WW, JAKI, P, JIN, F, JONES, CL, JONES, PG, JOSEPH, J, JUDD, EG, KABANA, S, KAJIMOTO, K, KANG, K, KAPITAN, J, KAPLAN, M, KEANE, D, KECHECHYAN, A, KETTLER, D, KHODYREV, VY, KIKOLA, DP, KIRYLUK, J, KISIEL, A, KLEIN, SR, KNOSPE, AG, KOCOLOSKI, A, KOETKE, DD, KOPYTINE, M, KOTCHENDA, L, KOUCHPIL, V, KRAVTSOV, P, KRAVTSOV, VI, KRUEGER, K, KRUS, M, KUHN, C, KUMAR, L, KURNADI, P, LAMONT, MAC, LANDGRAF, JM, LAPOINTE, S, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, CH, LEIGHT, W, LEVINE, MJ, LI, C, LI, Y, LIN, G, LIN, X, LINDENBAUM, SJ, LISA, MA, LIU, F, LIU, H, LIU, J, LIU, L, LJUBICIC, T, LLOPE, WJ, LONGACRE, RS, LOVE, WA, LU, Y, LUDLAM, T, LYNN, D, MA, GL, MA, YG, MAHAPATRA, DP, MAJKA, R, MALL, OI, MANGOTRA, LK, MANWEILER, R, MARGETIS, S, MARKERT, C, MATIS, HS, MATULENKO, YA, MCSHANE, TS, MESCHANIN, A, MILLNER, R, MINAEV, NG, MIODUSZEWSKI, S, MISCHKE, A, MITCHELL, J, MOHANTY, B, MOROZOV, DA, MUNHOZ, MG, NANDI, BK, NATTRASS, C, NAYAK, TK, NELSON, JM, NEPALI, C, NETRAKANTI, PK, NG, MJ, NOGACH, LV, NURUSHEV, SB, ODYNIEC, G, OGAWA, A, OKADA, H, OKOROKOV, V, OLSON, D, PACHR, M, PAGE, BS, PAL, SK, PANDIT, Y, PANEBRATSEV, Y, PAWLAK, T, PEITZMANN, T, PEREVOZTCHIKOV, V, PERKINS, C, PERYT, W, PHATAK, SC, PLANINIC, M, PLUTA, J, POLJAK, N, POSKANZER, AM, POTUKUCHI, BVKS, PRINDLE, D, PRUNEAU, C, PRUTHI, NK, PUTSCHKE, J, RANIWALA, R, RANIWALA, S, RAY, RL, REDWINE, R, REED, R, RIDIGER, A, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, ROSE, A, ROY, C, RUAN, L, RUSSCHER, MJ, RYKOV, V, SAHOO, R, SAKREJDA, I, SAKUMA, T, SALUR, S, SANDWEISS, J, SARSOUR, M, SAVIN, I, SCHAMBACH, J, SCHARENBERG, RP, SCHMITZ, N, SEGER, J, SELYUZHENKOV, I, SEYBOTH, R, SHABETAI, A, SHAHALIEV, E, SHAO, M, SHARMA, M, SHI, SS, SHI, XH, SICHTERMANN, E, SIMON, F, SINGARAJU, RN, SKOBY, MJ, SMIRNOV, N, SNELLINGS, R, SORENSEN, P, SOWINSKI, J, SPINKA, HM, SRIVASTAVA, B, STADNIK, A, STANISLAUS, TDS, STASZAK, D, STRIKHANOV, M, STRINGFELLOW, B, SUAIDE, AAP, SUAREZ, MC, SUBBA, NL, SUMBERA, M, SUN, XM, SUN, Y, SUN, Z, SURROW, B, SYMONS, TJM, DE TOLEDO, AS, TAKAHASHI, J, TANG, AH, TANG, Z, TARNOWSKY, T, THEIN, D, THOMAS, JH, TIAN, J, TIMMINS, AR, TIMOSHENKO, S, TLUSTY, D, TOKAREV, M, TRAINOR, TA, TRAM, VN, TRATTNER, AL, TRENTALANGE, S, TRIBBLE, RE, TSAI, OD, ULERY, J, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VAN LEEUWEN, M, MOLEN, AMV, VANFOSSEN, JA, VARMA, R, VASCONCELOS, GMS, VASILEVSKI, IM, VASILIEV, AN, VIDEBAEK, F, VIGDOR, SE, VIYOGI, YP, VOKAL, S, VOLOSHIN, SA, WADA, M, WAGGONER, WT, WALKER, M, WANG, F, WANG, G, WANG, JS, WANG, Q, WANG, X, WANG, XL, WANG, Y, WEBB, JC, WESTFALL, GD, WHITTEN, C, WIEMAN, H, WISSINK, SW, WITT, R, WU, Y, XU, N, XU, QH, XU, Y, XU, Z, YEPES, P, YOO, IK, YUE, Q, ZAWISZA, M, ZBROSZCZYK, H, ZHAN, W, ZHANG, H, ZHANG, S, ZHANG, WM, ZHANG, Y, ZHANG, ZP, ZHAO, Y, ZHONG, C, ZHOU, J, ZOULKARNEEV, R, ZOULKARNEEVA, Y, and ZUO, JX

Subjects
Nucleus Collisions, Particle Production, Canonical Suppression, Proton-Proton Collisions, Resonances, Strangeness Enhancement, Quark-Gluon Plasma, Heavy-Ion Collisions, Conservation, Rule, Collaboration, Pp Collisions, Model
Abstract

We study the beam-energy and system-size dependence of phi meson production (using the hadronic decay mode phi -> K(+) K(-)) by comparing the new results from Cu + Cu collisions and previously reported Au + Au collisions at root s(NN) = 62.4 and 200 GeV measured in the STAR experiment at RHIC. Data presented in this Letter are from mid-rapidity (vertical bar y vertical bar < 0.5) for 0.4 < p(T) < 5 GeV/c. At a given beam energy, the transverse momentum distributions for phi mesons are observed to be similar in yield and shape for Cu + Cu and Au + Au colliding systems with similar average numbers of participating nucleons. The phi meson yields in nucleus-nucleus collisions, normalized by the average number of participating nucleons, are found to be enhanced relative to those from p + p collisions. The enhancement for phi mesons lies between strange hadrons having net strangeness = 1 (K(-) and ) and net strangeness = 2 (Xi). The enhancement for phi mesons is observed to be higher at root s(NN) = 200 GeV compared to 62.4 GeV. These observations for the produced phi(s (s) over bar) mesons clearly suggest that, at these collision energies, the source of enhancement of strange hadrons is related to the formation of a dense partonic medium in high energy nucleus-nucleus collisions and cannot be alone due to canonical suppression of their production in smaller systems. (C) 2009

Published
2009

2. Delta phi Delta eta correlations in central Au plus Au collisions at root S-NN = 200 GeV

Author

ADAMS, J, AGGARWAL, MM, AHAMMED, Z, AMONETT, J, ANDERSON, BD, ANDERSON, M, ARKHIPKIN, D, AVERICHEV, GS, BAI, Y, BALEWSKI, J, BARANNIKOVA, O, LLOPE, WJ, LONG, H, LONGACRE, RS, LOPEZ-NORIEGA, M, LOVE, WA, LU, Y, LUDLAM, T, LYNN, D, MA, GL, BHASIN, A, GREBENYUK, O, MA, JG, MA, YG, MAGESTRO, D, MAHAPATRA, DP, MAJKA, R, MANGOTRA, LK, MANWEILER, R, MARGETIS, S, MARKERT, C, MARTIN, L, GROSNICK, D, BHATI, AK, MATIS, HS, MATULENKO, YA, MCCLAIN, CJ, MCSHANE, TS, MELNICK, Y, MESCHANIN, A, MILLER, ML, MINAEV, NG, MIODUSZEWSKI, S, GUERTIN, SM, MIRONOV, C, BICHSEL, H, MISCHKE, A, MISHRA, DK, MITCHELL, J, MOHANTY, B, MOLNAR, L, MOORE, CF, MOROZOV, DA, MUNHOZ, MG, GUIMARAES, KSFF, NANDI, BK, NATTRASS, C, BIELCIK, J, NAYAK, TK, NELSON, JM, NETRAKANTI, PK, NIKITIN, VA, NOGACH, LV, NURUSHEV, SB, ODYNIEC, G, GUO, Y, OGAWA, A, OKOROKOV, V, OLDENBURG, M, BIELCIKOVA, J, OLSON, D, PACHR, M, PAL, SK, PANEBRATSEV, Y, PANITKIN, SY, PAVLINOV, AI, GUPTA, N, PAWLAK, T, PEITZMANN, T, PEREVOZTCHIKOV, V, PERKINS, C, BLAND, LC, PERYT, W, PETROV, VA, PHATAK, SC, PICHA, R, PLANINIC, M, GUTIERREZ, TD, PLUTA, J, POLJAK, N, PORILE, N, PORTER, J, POSKANZER, AM, BLYTH, CO, POTEKHIN, M, POTREBENIKOVA, E, POTUKUCHI, BVKS, PRINDLE, D, HAAG, B, PRUNEAU, C, PUTSCHKE, J, RAKNESS, G, RANIWALA, R, RANIWALA, S, RAY, RL, BLYTH, SL, RAZIN, SV, REINNARTH, J, RELYEA, D, HALLMAN, TJ, RETIERE, F, RIDIGER, A, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, ROSE, A, BONNER, BE, ROY, C, RUAN, L, HAMED, A, RUSSCHER, MJ, SAHOO, R, SAKREJDA, I, SALUR, S, SANDWEISS, J, SARSOUR, M, SAZHIN, PS, SCHAMBACH, J, BOTJE, M, SCHARENBERG, RP, BARNBY, LS, SCHMITZ, N, SCHWEDA, K, SEGER, J, SELYUZHENKOV, I, SEYBOTH, P, SHABETAI, A, SHAHALIEV, E, SHAO, M, SHARMA, M, BOUCHET, J, HARRIS, JW, SHEN, WQ, SHIMANSKIY, SS, SICHTERMANN, E, SIMON, F, SINGARAJU, RN, SMIRNOV, N, SNELLINGS, R, SOOD, G, SORENSEN, P, SOWINSKI, J, HE, W, BRANDIN, AV, SPELTZ, J, SPINKA, HM, SRIVASTAVA, B, STADNIK, A, STANISLAUS, TDS, STOCK, R, STOLPOVSKY, A, STRIKHANOV, M, STRINGFELLOW, B, HEINZ, M, SUAIDE, AAP, BRAVAR, A, SUGARBAKER, E, SUMBERA, M, SUN, Z, SURROW, B, SWANGER, M, SYMONS, TJM, DE TOLEDO, AS, TAKAHASHI, ATJ, HENRY, TW, TANG, AH, TARNOWSKY, T, BYSTERSKY, M, THEIN, D, THOMAS, JH, TIMMINS, AR, TIMOSHENKO, S, TOKAREV, M, TRENTALANGE, S, TRIBBLE, RE, HEPPLEMANN, S, TSAI, OD, ULERY, J, ULLRICH, T, CADMAN, RV, UNDERWOOD, DG, VAN BUREN, G, VAN DER KOLK, N, VAN LEEUWEN, M, MOLEN, AMV, VARMA, R, HIPPOLYTE, B, VASILEVSKI, IM, VASILIEV, AN, VERNET, R, VIGDOR, SE, CAI, XZ, VIYOGI, YP, VOKAL, S, VOLOSHIN, SA, WAGGONER, WT, WANG, F, HIRSCH, A, WANG, G, WANG, JS, WANG, XL, WANG, Y, WATSON, JW, CAINES, H, WEBB, JC, WESTFALL, GD, WETZLER, A, WHITTEN, C, HJORT, E, WIEMAN, H, WISSINK, SW, WITT, R, WOOD, J, WU, J, XU, N, SANCHEZ, MCDB, XU, QH, XU, Z, YEPES, P, HOFFMANN, GW, YOO, IK, YUREVICH, VI, ZHAN, W, ZHANG, H, ZHANG, WM, ZHANG, Y, ZHANG, ZP, CASTILLO, J, ZHAO, Y, ZHONG, C, HORNER, MJ, ZOULKARNEEV, R, ZOULKARNEEVA, Y, ZUBAREV, AN, ZUO, JX, CATU, O, CEBRA, D, CHAJECKI, Z, CHALOUPKA, P, CHATTOPADHYAY, S, CHEN, HF, BAUDOT, J, CHEN, JH, CHEN, Y, CHENG, J, CHERNEY, M, CHIKANIAN, A, CHOI, HA, CHRISTIE, W, COFFIN, JP, CORMIER, TM, COSENTINO, MR, HUANG, HZ, CRAMER, JG, CRAWFORD, HJ, DAS, D, DAS, S, DAUGHERITY, M, DE MOURA, MM, DEDOVICH, TG, DEPHILLIPS, M, DEREVSCHIKOV, AA, DIDENKO, L, HUANG, SL, DIETEL, T, DJAWOTHO, P, DOGRA, SM, DONG, WJ, DONG, X, DRAPER, JE, DU, F, DUNIN, VB, DUNLOP, JC, MAZUMDAR, MRD, HUGHES, EW, ECKARDT, V, EDWARDS, WR, EFIMOV, LG, EMELIANOV, V, ENGELAGE, J, EPPLEY, G, ERAZMUS, B, ESTIENNE, M, FACHINI, P, FATEMI, R, HUMANIC, TJ, FEDORISIN, J, FILIMONOV, K, FILIP, P, FINCH, E, FINE, V, FISYAK, Y, FU, J, GAGLIARDI, CA, GAILLARD, L, GANS, J, IGO, G, GANTI, MS, GHAZIKHANIAN, V, GHOSH, P, GONZALEZ, JE, GORBUNOV, YG, GOS, H, JACOBS, P, JACOBS, WW, JAKL, P, JIA, F, JIANG, H, BEKELE, S, JONES, PG, JUDD, EG, KABANA, S, KANG, K, KAPITAN, J, KAPLAN, M, KEANE, D, KECHECHYAN, A, KHODYREV, VY, KIM, BC, BELAGA, VV, KIRYLUK, J, KISIEL, A, KISLOV, EM, KLEIN, SR, KOETKE, DD, KOLLEGGER, T, KOPYTINE, M, KOTCHENDA, L, KOUCHPIL, V, KOWALIK, KL, BELLINGERI-LAURIKAINEN, A, KRAMER, M, KRAVTSOV, P, KRAVTSOV, VI, KRUEGER, K, KUHN, C, KULIKOV, AI, KUMAR, A, KUZNETSOV, AA, LAMONT, MAC, LANDGRAF, JM, BELLWIED, R, LANGE, S, LAPOINTE, S, LAUE, F, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, CH, LEHOCKA, S, LEVINE, MJ, LI, C, BEZVERKHNY, BI, LI, Q, LI, Y, LIN, G, LINDENBAUM, SJ, LISA, MA, LIU, F, LIU, H, LIU, J, LIU, L, LIU, Z, BHARADWAJ, S, and LJUBICIC, T

Subjects
Rhic/Lhc, Physics, Nuclear, Quark-Gluon Plasma, Angular-Correlations, Nuclear Experiment, Hadronization, Model
Abstract

We report charged particle pair correlation analyses in the space of Delta phi (azimuth) and Delta eta (pseudorapidity), for central Au+Au collisions at root s(NN)=200 GeV in the STAR detector. The analysis involves unlike-sign charged pairs and like-sign charged pairs, which are transformed into charge-dependent (CD) signals and charge-independent (CI) signals. We present detailed parametrizations of the data. A model featuring dense gluonic hot spots as first proposed by Van Hove predicts that the observables under investigation would have sensitivity to such a substructure should it occur, and the model also motivates selection of transverse momenta in the range 0.8 < p(t)< 2.0 GeV/c. Both CD and CI correlations of high statistical significance are observed, and possible interpretations are discussed.

Published
2007

3. phi meson production in Au + Au and p + p collisions at root S-NN=200 GeV

Author

ADAMS, J, ADLER, C, AGGARWAL, MM, AHAMMED, Z, AMONETT, J, ANDERSON, BD, ARKHIPKIN, D, AVERICHEV, GS, BADYAL, SK, BALEWSKI, J, BARANNIKOVA, O, BARNBY, LS, BAUDOT, J, BEKELE, S, BELAGA, VV, BELLWIED, R, BERGER, J, BEZVERKHNY, BI, BHARDWAJ, S, BHATI, AK, BICHSEL, H, BILLMEIER, A, BLAND, LC, BLYTH, CO, BONNER, BE, BOTJE, M, BOUCHAM, A, BRANDIN, A, BRAVAR, A, CADMAN, RV, CAI, XZ, CAINES, H, SANCHEZ, MCD, CARROLL, J, CASTILLO, J, CEBRA, D, CHALOUPKA, P, CHATTOPADHYAY, S, CHEN, HF, CHEN, Y, CHERNENKO, SP, CHERNEY, M, CHIKANIAN, A, CHRISTIE, W, COFFIN, JP, CORMIER, TM, CRAMER, JG, CRAWFORD, HJ, DAS, D, DAS, S, DEREVSCHIKOV, AA, DIDENKO, L, DIETEL, T, DONG, WJ, DONG, X, DRAPER, JE, DU, F, DUBEY, AK, DUNIN, VB, DUNLOP, JC, MAJUMDAR, MRD, ECKARDT, V, EFIMOV, LG, EMELIANOV, V, ENGELAGE, J, EPPLEY, G, ERAZMUS, B, ESTIENNE, M, FACHINI, P, FAINE, V, FAIVRE, J, FATEMI, R, FILIMONOV, K, FILIP, P, FINCH, E, FISYAK, Y, FLIERL, D, FOLEY, KJ, FU, J, GAGLIARDI, CA, GAGUNASHVILI, N, GANS, J, GANTI, MS, GAUDICHET, L, GERMAIN, M, GEURTS, F, GHAZIKHANIAN, V, GHOSH, P, GONZALEZ, JE, GRACHOV, O, GREBENYUK, O, GRONSTAL, S, GROSNICK, D, GUEDON, M, GUERTIN, SM, GUPTA, A, GUTIERREZ, TD, HALLMAN, TJ, HAMED, A, HARDTKE, D, HARRIS, JW, HEINZ, M, HENRY, TW, HEPPELMANN, S, HIPPOLYTE, B, HIRSCH, A, HJORT, E, HOFFMANN, GW, HORSLEY, M, HUANG, HZ, HUANG, SL, HUGHES, E, HUMANIC, TJ, IGO, G, ISHIHARA, A, JACOBS, P, JACOBS, WW, JANIK, M, JIANG, H, JOHNSON, I, JONES, PG, JUDD, EG, KABANA, S, KAPLAN, M, KEANE, D, KHODYREV, VY, KIRYLUK, J, KISIEL, A, KLAY, J, KLEIN, SR, KLYACHKO, A, KOETKE, DD, KOLLEGGER, T, KOPYTINE, M, KOTCHENDA, L, KOVALENKO, AD, KRAMER, M, KRAVTSOV, P, KRAVTSOV, VI, KRUEGER, K, KUHN, C, KULIKOV, AI, KUMAR, A, KUNDE, GJ, KUNZ, CL, KUTUEV, RK, KUZNETSOV, AA, LAMONT, MAC, LANDGRAF, JM, LANGE, S, LASIUK, B, LAUE, F, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEVINE, MJ, LI, C, LI, Q, LINDENBAUM, SJ, LISA, MA, LIU, F, LIU, L, LIU, Z, LIU, QJ, LJUBICIC, T, LLOPE, WJ, LONG, H, LONGACRE, RS, LOPEZ-NORIEGA, M, LOVE, WA, LUDLAM, T, LYNN, D, MA, J, MA, YG, MAGESTRO, D, MAHAJAN, S, MANGOTRA, LK, MAHAPATRA, DP, MAJKA, R, MANWEILER, R, MARGETIS, S, MARKERT, C, MARTIN, L, MARX, J, MATIS, HS, MATULENKO, YA, MCCLAIN, CJ, MCSHANE, TS, MEISSNER, E, MELNICK, Y, MESCHANIN, A, MILLER, ML, MILOSEVICH, Z, MINAEV, NG, MIRONOV, C, MISCHKE, A, MISHRA, D, MITCHELL, J, MOHANTY, B, MOLNAR, L, MOORE, CF, MORA-CORRAL, MJ, MOROZOV, DA, MOROZOV, V, DE MOURA, MM, MUNHOZ, MG, NANDI, BK, NAYAK, SK, NAYAK, TK, NELSON, JM, NETRAKANTI, PK, NIKITIN, VA, NOGACH, LV, NORMAN, B, NURUSHEV, SB, ODYNIEC, G, OGAWA, A, OKOROKOV, V, OLDENBURG, A, OLSON, D, PAIC, G, PAL, SK, PANEBRATSEV, Y, PANITKIN, SY, PAVLINOV, AI, PAWLAK, T, PEITZMANN, T, PEREVOZTCHIKOV, V, PERKINS, C, PERYT, W, PETROV, VA, PHATAK, SC, PICHA, R, PLANINIC, M, PLUTA, J, PORILE, N, PORTER, J, POSKANZER, AM, POTEKHIN, M, POTREBENIKOVA, E, POTUKUCHI, BVKS, PRINDLE, D, PRUNEAU, C, PUTSCHKE, J, RAI, G, RAKNESS, G, RANIWALA, R, RANIWALA, S, RAVEL, O, RAY, RL, RAZIN, SV, REICHHOLD, D, REID, JG, RENAULT, G, RETIERE, F, RIDIGER, A, RITTER, HG, ROBERTS, JB, ROGACHEVSKI, OV, ROMERO, JL, ROSE, A, ROY, C, RUAN, LJ, SAHOO, R, SAKREJDA, I, SALUR, S, SANDWEISS, J, SAVIN, I, SCHAMBACH, J, SCHARENBERG, RP, SCHMITZ, N, SCHROEDER, LS, SCHWEDA, K, SEGER, J, SEYBOTH, P, SHAHALIEV, E, SHAO, M, SHAO, W, SHARMA, M, SHESTERMANOV, KE, SHIMANSKII, SS, SINGARAJU, RN, SIMON, F, SKORO, G, SMIRNOV, N, SNELLINGS, R, SOOD, G, SORENSEN, R, SOWINSKI, J, SPINKA, HM, SRIVASTAVA, B, STANISLAUS, TDS, STOCK, R, STOLPOVSKY, A, STRIKHANOV, M, STRINGFELLOW, B, STRUCK, C, SUAIDE, AAP, SUGARBAKER, E, SUIRE, C, SUMBERA, M, SURROW, B, SYMONS, TJM, DE TOLEDO, AS, SZARWAS, P, TAI, A, TAKAHASHI, J, TANG, AH, THEIN, D, THOMAS, JH, TIMOSHENKO, S, TOKAREV, M, TONJES, MB, TRAINOR, TA, TRENTALANGE, S, TRIBBLE, RE, TSAI, O, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VANDERMOLEN, AM, VARMA, R, VASILEVSKI, I, VASILIEV, AN, VIGDOR, SE, VIYOGI, YP, VOLOSHIN, SA, VZNUZDAEV, M, WAGGONER, W, WANG, F, WANG, G, WANG, XL, WANG, Y, WANG, ZM, WARD, H, WATSON, JW, WEBB, JC, WELLS, R, WESTFALL, GD, WHITTEN, C, WIEMAN, H, WILLSON, R, WISSINK, SW, WITT, R, WOOD, J, WU, J, XU, N, XU, Z, XU, ZZ, YAMAMOTO, E, YEPES, P, YUREVICH, VI, YUTING, B, ZANEVSKI, YV, ZHANG, H, ZHANG, WM, ZHANG, ZP, ZHAOMIN, ZP, ZOLNIERCZUK, PA, ZOULKARNEEV, R, ZOULKARNEEVA, J, and ZUBAREV, AN

Subjects
Kaon Production, Au+Au Collisions, Phenomenology, Extraction, Model
Abstract

We report the STAR measurement of phi meson production in Au + Au and p + p collisions at root s(NN) = 200 GeV. Using the event mixing technique, the phi spectra and yields are obtained at mid-rapidity for five centrality bins in Au + Au collisions and for non-singly-diffractive p + p collisions. It is found that the phi transverse momentum distributions from Au + An collisions are better fitted with a single-exponential while the p + p spectrum is better described by a double-exponential distribution. The measured nuclear modification factors indicate that phi production in central An + An collisions is suppressed relative to peripheral collisions when scaled by the number of binary collisions (< N-bin>). The systematics of < p(t)> versus centrality and the constant phi/K- ratio versus beam species, centrality, and collision energy rule out kaon coalescence as the dominant mechanism for phi production. (c) 2005

Published
2005

4. Pion, kaon, proton and anti-proton transverse momentum distributions from p+p and d+Au collisions at root(NN)-N-S=200GeV

Author

ADAMS, J, AGGARWAL, MM, AHAMMED, Z, AMONETT, J, ANDERSON, BD, ARKHIPKIN, D, AVERICHEV, GS, BADYAL, SK, BAI, Y, BALEWSKI, J, BARANNIKOVA, O, GUERTIN, SM, GUO, Y, GUPTA, A, GUTIERREZ, TD, HALLMAN, TJ, HAMED, A, HARDTKE, D, HARRIS, JW, HEINZ, M, HENRY, TW, BARNBY, LS, HEPPLEMANN, S, HIPPOLYTE, B, HIRSCH, A, HJORT, E, HOFFMANN, GW, HUANG, HZ, HUANG, SL, HUGHES, EW, HUMANIC, TJ, IGO, G, BAUDOT, J, ISHIHARA, A, JACOBS, P, JACOBS, WW, JANIK, M, JIANG, H, JONES, PG, JUDD, EG, KABANA, S, KANG, K, KAPLAN, M, BEKELE, S, KEANE, D, KHODYREV, VY, KIRYLUK, J, KISIEL, A, KISLOV, EM, KLAY, J, KLEIN, SR, KOETKE, DD, KOLLEGGER, T, KOPYTINE, M, BELAGA, VV, KOTCHENDA, Y, KRAMER, M, KRAVTSOV, P, KRAVTSOV, VI, KRUEGER, K, KUHN, C, KULIKOV, AI, KUMAR, A, KUTUEV, RK, KUZNETSOV, AA, BELLWIED, R, LAMONT, MAC, LANDGRAF, JM, LANGE, S, LAUE, F, LEBEDEV, A, LEDNICKY, R, LEHOCKA, S, LEVINE, MJ, LI, C, LI, Q, BERGER, J, LI, Y, LIN, G, LINDENBAUM, SJ, LISA, MA, LIU, F, LIU, L, LIU, QJ, LIU, Z, LJUBICIC, T, LLOPE, WJ, BEZVERKHNY, BI, LONG, H, LONGACRE, RS, LOPEZ-NORIEGA, M, LOVE, WA, LU, Y, LUDLAM, T, LYNN, D, MA, GL, MA, JG, MA, YG, BHARADWAJ, S, MAGESTRO, D, MAHAJAN, S, MAHAPATRA, DP, MAJKA, R, MANGOTRA, LK, MANWEILER, R, MARGETIS, S, MARKERT, C, MARTIN, L, MARX, JN, BHASIN, A, MATIS, HS, MATULENKO, YA, MCCLAIN, CJ, MCSHANE, TS, MEISSNER, F, MELNICK, Y, MESCHANIN, A, MILLER, ML, MINAEV, NG, MIRONOV, C, BHATI, AK, MISCHKE, A, MISHRA, DK, MITCHELL, J, MOHANTY, B, MOLNAR, L, MOORE, CF, MOROZOV, DA, MUNHOZ, MG, NANDI, BK, NAYAK, SK, BHATIA, VS, NAYAK, TK, NELSON, JM, NETRAKANTI, PK, NIKITIN, VA, NOGACH, LV, NURUSHEV, SB, ODYNIEC, G, OGAWA, A, OKOROKOV, V, OLDENBURG, M, BICHSEL, H, OLSON, D, PAL, SK, PANEBRATSEV, Y, PANITKIN, SY, PAVLINOV, AI, PAWLAK, T, PEITZMANN, T, PEREVOZTCHIKOV, V, PERKINS, C, PERYT, W, BIELCIK, J, PETROV, VA, PHATAK, SC, PICHA, R, PLANINIC, M, PLUTA, J, PORILE, N, PORTER, J, POSKANZER, AM, POTEKHIN, M, POTREBENIKOVA, E, BIELCIKOVA, J, POTUKUCHI, BVKS, PRINDLE, D, PRUNEAU, C, PUTSCHKE, J, RAKNESS, G, RANIWALA, R, RANIWALA, S, RAVEL, O, RAY, RL, RAZIN, SV, BILLMEIER, A, REICHHOLD, D, REID, JG, RENAULT, G, RETIERE, F, RIDIGER, A, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, ROSE, A, BLAND, LC, ROY, C, RUAN, L, SAHOO, R, SAKREJDA, I, SALUR, S, SANDWEISS, J, SARSOUR, M, SAVIN, I, SAZHIN, PS, SCHAMBACH, J, BLYTH, CO, SCHARENBERG, RP, SCHMITZ, N, SCHWEDA, K, SEGER, J, SEYBOTH, P, SHAHALIEV, E, SHAO, M, SHAO, W, SHARMA, M, SHEN, WQ, BONNER, BE, SHESTERMANOV, KE, SHIMANSKIY, SS, SICHTERMANN, E, SIMON, F, SINGARAJU, RN, SKORO, G, SMIRNOV, N, SNELLINGS, R, SOOD, G, SORENSEN, P, BOTJE, M, SOWINSKI, J, SPELTZ, J, SPINKA, HM, SRIVASTAVA, B, STADNIK, A, STANISLAUS, TDS, STOCK, R, STOLPOVSKY, A, STRIKHANOV, M, STRINGFELLOW, B, BOUCHAM, A, SUAIDE, AAP, SUGARBAKER, E, SUIRE, C, SUMBERA, M, SURROW, B, SYMONS, TJM, DE TOLEDO, AS, SZARWAS, P, TAI, A, TAKAHASHI, J, BRANDIN, AV, TANG, AH, TARNOWSKY, T, THEIN, D, THOMAS, JH, TIMOSHENKO, S, TOKAREV, M, TRAINOR, TA, TRENTALANGE, S, TRIBBLE, RE, TSAI, OD, BRAVAR, A, ULERY, J, ULLRICH, T, UNDERWOOD, DG, URKINBAEV, A, VAN BUREN, G, VAN LEEUWEN, M, VANDER MOLEN, AM, VARMA, R, VASILEVSKI, IM, VASILIEV, AN, BYSTERSKY, M, VERNET, R, VIGDOR, SE, VIYOGI, YP, VOKAL, S, VOLOSHIN, SA, VZNUZDAEV, M, WAGGONER, WT, WANG, F, WANG, G, WANG, XL, CADMAN, R, WANG, Y, WANG, ZM, WARD, H, WATSON, JW, WEBB, JC, WELLS, R, WESTFALL, GD, WETZLER, A, WHITTEN, C, WIEMAN, H, CAI, XZ, WISSINK, SW, WITT, R, WOOD, J, WU, J, XU, N, XU, Z, XU, ZZ, YAMAMOTO, E, YEPES, P, YUREVICH, VI, CAINES, H, ZANEVSKY, YV, ZHANG, H, ZHANG, WM, ZHANG, ZP, ZOULKARNEEV, R, ZOULKARNEEVA, Y, ZUBAREV, A, SANCHEZ, MCD, CASTILLO, J, CATU, O, CEBRA, D, CHAJECKI, Z, CHALOUPKA, R, CHATTOPADHYAY, S, CHEN, HF, CHEN, Y, CHENG, J, CHERNEY, M, CHIKANIAN, A, CHRISTIE, W, COFFIN, JP, CORMIER, TM, CRAMER, JG, CRAWFORD, HJ, DAS, D, DAS, S, DE MOURA, MM, DEREVSCHIKOV, AA, DIDENKO, L, DIETEL, T, DOGRA, SM, DONG, WJ, DONG, X, DRAPER, JE, DU, F, DUBEY, AK, DUNIN, VB, DUNLOP, JC, MAZUMDAR, MRD, ECKARDT, V, EDWARDS, WR, EFIMOV, LG, EMELIANOV, V, ENGELAGE, J, EPPLEY, G, ERAZMUS, B, ESTIENNE, M, FACHINI, P, FAIVRE, J, FATEMI, R, FEDORISIN, J, FILIMONOV, K, FILIP, P, FINCH, E, FINE, V, FISYAK, Y, FOMENKO, K, FU, J, GAGLIARDI, CA, GAILLARD, L, GANS, J, GANTI, MS, GAUDICHET, L, GEURTS, F, GHAZIKHANIAN, V, GHOSH, P, GONZALEZ, JE, GRACHOV, O, GREBENYUK, O, and GROSNICK, D

Subjects
Star, Plus Au, Hadron, Time Projection Chamber, Resistive Plate Chambers, Dependence, Qcd, Model
Abstract

Identified mid-rapidity particle spectra of pi(+/-), K+/-, and p((p) over bar) from 200 GeV p + p and d + Au collisions are reported. A time-of-flight detector based on multi-gap resistive plate chamber technology is used for particle identification. The particle-species dependence of the Cronin effect is observed to be significantly smaller than that at lower energies. The ratio of the nuclear modification factor (R-dAu) between protons (p + (p) over bar) and charged hadrons (h) in the transverse momentum range 1.2 < p(T) < 3.0 GeV/c is measured to be 1.19 +/- 0.05(stat) +/- 0.03(syst) in minimum-bias collisions and shows little centrality dependence. The yield ratio of (p + (p) over bar)/h in minimum-bias d + Au collisions is found to be a factor of 2 lower than that in Au + Au collisions, indicating that the Cronin effect alone is not enough to account for the relative baryon enhancement observed in heavy ion collisions at RHIC. (c) 2005

Published
2005

5. Multiplicity and pseudorapidity distributions of photons in Au+Au collisions at root s(NN)=62.4 GeV

Author

ADAMS, J, AGGARWAL, MM, AHAMMED, Z, AMONETT, J, ANDERSON, BD, ARKHIPKIN, D, AVERICHEV, GS, BADYAL, SK, BAI, Y, BALEWSKI, J, BARANNIKOVA, O, BARNBY, LS, BAUDOT, J, BEKELE, S, BELAGA, VV, BELLINGERI-LAURIKAINEN, A, BELLWIED, R, BERGER, J, BEZVERKHNY, BI, BHARDWAJ, S, BHASIN, A, BHATI, AK, BICHSEL, H, BIELCIK, J, BIELCIKOVA, J, BILLMEIER, A, BLAND, LC, BLYTH, CO, BLYTH, S, BONNER, BE, BOTJE, M, BOUCHAM, A, BOUCHET, J, BRANDIN, AV, BRAVAR, A, BYSTERSKY, M, CADMAN, RV, CAI, XZ, CAINES, H, SANCHEZ, MCDL, CASTILLO, J, CATU, O, CEBRA, D, CHAJECKI, Z, CHALOUPKA, P, CHATTOPADHYAY, S, CHEN, HF, CHEN, Y, CHENG, J, CHERNEY, M, CHIKANIAN, A, CHRISTIE, W, COFFIN, JP, CORMIER, TM, COSENTINO, MR, CRAMER, JG, CRAWFORD, HJ, DAS, D, DAS, S, DE MOURA, MM, DEDOVICH, TG, DEREVSCHIKOV, AA, DIDENKO, L, DIETEL, T, DOGRA, SM, DONG, WJ, DONG, X, DRAPER, JE, DU, F, DUBEY, AK, DUNIN, VB, DUNLOP, JC, MAZUMDAR, MRD, ECKARDT, V, EDWARDS, WR, EFIMOV, LG, EMELIANOV, V, ENGELAGE, J, EPPLEY, G, ERAZMUS, B, ESTIENNE, M, FACHINI, P, FAIVRE, J, FATEMI, R, FEDORISIN, J, FILIMONOV, K, FILIP, P, FINCH, E, FINE, V, FISYAK, Y, FORNAZIER, KSF, FU, J, GAGLIARDI, CA, GAILLARD, L, GANS, J, GANTI, MS, GEURTS, F, GHAZIKHANIAN, V, GHOSH, P, GONZALEZ, JE, GOS, H, GRACHOV, O, GREBENYUK, O, GROSNICK, D, GUERTIN, SM, GUO, Y, GUPTA, A, GUTIERREZ, TD, HALLMAN, TJ, HAMED, A, HARDTKE, D, HARRIS, JW, HEINZ, M, HENRY, TW, HEPPLEMANN, S, HIPPOLYTE, B, HIRSCH, A, HJORT, E, HOFFMANN, GW, HORNER, M, HUANG, HZ, HUANG, SL, HUGHES, EW, HUMANIC, TJ, IGO, G, ISHIHARA, A, JACOBS, P, JACOBS, WW, JEDYNAK, M, JIANG, H, JONES, PG, JUDD, EG, KABANA, S, KANG, K, KAPLAN, M, KEANE, D, KECHECHYAN, A, KHODYREV, VY, KIRYLUK, J, KISIEL, A, KISLOV, EM, KLAY, J, KLEIN, SR, KOETKE, DD, KOLLEGGER, T, KOPYTINE, M, KOTCHENDA, L, KOWALIK, KL, KRAMER, M, KRAVTSOV, P, KRAVTSOV, VI, KRUEGER, K, KUHN, C, KULIKOV, AI, KUMAR, A, KUTUEV, RK, KUZNETSOV, AA, LAMONT, MAC, LANDGRAF, JM, LANGE, S, LAUE, F, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEHOCKA, S, LEVINE, MJ, LI, C, LI, Q, LI, Y, LIN, G, LINDENBAUM, SJ, LISA, MA, LIU, F, LIU, H, LIU, J, LIU, L, LIU, QJ, LIU, Z, LJUBICIC, T, LLOPE, WJ, LONG, H, LONGACRE, RS, LOPEZ-NORIEGA, M, LOVE, WA, LU, Y, LUDLAM, T, LYNN, D, MA, GL, MA, JG, MA, YG, MAGESTRO, D, MAHAJAN, S, MAHAPATRA, DP, MAJKA, R, MANGOTRA, LK, MANWEILER, R, MARGETIS, S, MARKERT, C, MARTIN, L, MARX, JN, MATIS, HS, MATULENKO, YA, MCCLAIN, CJ, MCSHANE, TS, MEISSNER, F, MELNICK, Y, MESCHANIN, A, MILLER, ML, MINAEV, NG, MIRONOV, C, MISCHKE, A, MISHRA, DK, MITCHELL, J, MOHANTY, B, MOLNAR, L, MOORE, CF, MOROZOV, DA, MUNHOZ, MG, NANDI, BK, NAYAK, SK, NAYAK, TK, NELSON, JM, NETRAKANTI, PK, NIKITIN, VA, NOGACH, LV, NURUSHEV, SB, ODYNIEC, G, OGAWA, A, OKOROKOV, V, OLDENBURG, M, OLSON, D, PAL, SK, PANEBRATSEV, Y, PANITKIN, SY, PAVLINOV, AI, PAWLAK, T, PEITZMANN, T, PEREVOZTCHIKOV, V, PERKINS, C, PERYT, W, PETROV, VA, PHATAK, SC, PICHA, R, PLANINIC, M, PLUTA, J, PORILE, N, PORTER, J, POSKANZER, AM, POTEKHIN, M, POTREBENIKOVA, E, POTUKUCHI, BVKS, PRINDLE, D, PRUNEAU, C, PUTSCHKE, J, RAKNESS, G, RANIWALA, R, RANIWALA, S, RAVEL, O, RAY, RL, RAZIN, SV, REICHHOLD, D, REID, JG, REINNARTH, J, RENAULT, G, RETIERE, F, RIDIGER, A, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, ROSE, A, ROY, C, RUAN, L, RUSSCHER, MJ, SAHOO, R, SAKREJDA, I, SALUR, S, SANDWEISS, J, SARSOUR, M, SAVIN, I, SAZHIN, PS, SCHAMBACH, J, SCHARENBERG, RP, SCHMITZ, N, SCHWEDA, K, SEGER, J, SEYBOTH, P, SHAHALIEV, E, SHAO, M, SHAO, W, SHARMA, M, SHEN, WQ, SHESTERMANOV, KE, SHIMANSKIY, SS, SICHTERMANN, E, SIMON, F, SINGARAJU, RN, SMIRNOV, N, SNELLINGS, R, SOOD, G, SORENSEN, P, SOWINSKI, J, SPELTZ, J, SPINKA, HM, SRIVASTAVA, B, STADNIK, A, STANISLAUS, TDS, STOCK, R, STOLPOVSKY, A, STRIKHANOV, M, STRINGFELLOW, B, SUAIDE, AAP, SUGARBAKER, E, SUIRE, C, SUMBERA, M, SURROW, B, SWANGER, M, SYMONS, TJM, DE TOLEDO, AS, TAI, A, TAKAHASHI, J, TANG, AH, TARNOWSKY, T, THEIN, D, THOMAS, JH, TIMOSHENKO, S, TOKAREV, M, TRAINOR, TA, TRENTALANGE, S, TRIBBLE, RE, TSAI, OD, ULERY, J, ULLRICH, T, UNDERWOOD, DG, BUREN, GV, VAN LEEUWEN, M, MOLEN, AMV, VARMA, R, VASILEVSKI, IM, VASILIEV, AN, VERNET, R, VIGDOR, SE, VIYOGI, YP, VOKAL, S, VOLOSHIN, SA, WAGGONER, WT, WANG, F, WANG, G, WANG, XL, WANG, Y, WANG, ZM, WARD, H, WATSON, JW, WEBB, JC, WESTFALL, GD, WETZLER, A, WHITTEN, C, WIEMAN, H, WISSINK, SW, WITT, R, WOOD, J, WU, J, XU, N, XU, Z, XU, ZZ, YAMAMOTO, E, YEPES, P, YUREVICH, VI, ZBOROVSKY, I, ZHANG, H, ZHANG, WM, ZHANG, Y, ZHANG, ZP, ZOULKARNEEV, R, ZOULKARNEEVA, Y, and ZUBAREV, AN

Subjects
Au Collisions, Detector, Nuclear Collisions, Cross-Sections, Model
Abstract

We present the first measurement of pseudorapidity distribution of photons in the region 2.3

Published
2005

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