/ Experiment-Nucl arXiv:1005.2307


Balance Functions from Au$+$Au, $d+$Au, and $p+p$ Collisions at $\sqrt{s_{NN}}$ = 200 GeV


Aggarwal, M.M. (Panjab U.) ; Ahammed, Z. (LBL, Berkeley) ; Alakhverdyants, A.V. (Dubna, JINR) ; Alekseev, I. (Moscow, ITEP) ; Alford, J. (Kent State U.) ; Anderson, B.D. (Kent State U.) ; Arkhipkin, D. (Brookhaven) ; Averichev, G.S. (Dubna, JINR) ; Balewski, J. (MIT) ; Barnby, L.S. (Birmingham U.) ; Baumgart, S. (Yale U.) ; Beavis, D.R. (Brookhaven) ; Bellwied, R. (Wayne State U.) ; Betancourt, M.J. (MIT) ; Betts, R.R. (Illinois U., Chicago) ; Bhasin, A. (Jammu U.) ; Bhati, A.K. (Panjab U.) ; Bichsel, H. (Washington U., Seattle) ; Bielcik, J. (Prague, Tech. U.) ; Bielcikova, J. (Rez, Nucl. Phys. Inst.) ; Biritz, B. (UCLA) ; Bland, L.C. (Brookhaven) ; Bonner, B.E. (Rice U.) ; Bouchet, J. (Kent State U.) ; Braidot, E. (NIKHEF, Amsterdam) ; Brandin, A.V. (Moscow Phys. Eng. Inst.) ; Bridgeman, A. (Argonne) ; Bruna, E. (Yale U.) ; Bueltmann, S. (Old Dominion U.) ; Bunzarov, I. (Dubna, JINR) ; Burton, T.P. (Brookhaven) ; Cai, X.Z. (SINAP, Shanghai) ; Caines, H. (Yale U.) ; Calderon de la Barca Sanchez, M. (UC, Davis) ; Catu, O. (Yale U.) ; Cebra, D. (UC, Davis) ; Cendejas, R. (UCLA) ; Cervantes, M.C. (Texas A-M) ; Chajecki, Z. (Ohio State U.) ; Chaloupka, P. (Rez, Nucl. Phys. Inst.) ; Chattopadhyay, S. (Calcutta, VECC) ; Chen, H.F. (Hefei, CUST) ; Chen, J.H. (SINAP, Shanghai) ; Chen, J.Y. (Hua-Zhong Normal U.) ; Cheng, J. (Tsinghua U., Beijing) ; Cherney, M. (Creighton U.) ; Chikanian, A. (Yale U.) ; Choi, K.E. (Pusan Natl. U.) ; Christie, W. (Brookhaven) ; Chung, P. (Rez, Nucl. Phys. Inst.) ; Clarke, R.F. (Texas A-M) ; Codrington, M.J.M. (Texas A-M) ; Corliss, R. (MIT) ; Cramer, J.G. (Washington U., Seattle) ; Crawford, H.J. (UC, Berkeley) ; Das, D. (UC, Davis) ; Dash, S. (Bhubaneswar, Inst. Phys.) ; Leyva, A.Davila (Texas U.) ; De Silva, L.C. (Wayne State U.) ; Debbe, R.R. (Brookhaven) ; Dedovich, T.G. (Dubna, JINR) ; Derevschikov, A.A. (Serpukhov, IHEP) ; Derradi de Souza, R. (Campinas State U.) ; Didenko, L. (Brookhaven) ; Djawotho, P. (Texas A-M) ; Dogra, S.M. (Jammu U.) ; Dong, X. (LBL, Berkeley) ; Drachenberg, J.L. (Texas A-M) ; Draper, J.E. (UC, Davis) ; Dunlop, J.C. (Brookhaven) ; Mazumdar, M.R.Dutta (Calcutta, VECC) ; Efimov, L.G. (Dubna, JINR) ; Elhalhuli, E. (Birmingham U.) ; Elnimr, M. (Wayne State U.) ; Engelage, J. (UC, Berkeley) ; Eppley, G. (Rice U.) ; Erazmus, B. (SUBATECH, Nantes) ; Estienne, M. (SUBATECH, Nantes) ; Eun, L. (Penn State U.) ; Evdokimov, O. (Illinois U., Chicago) ; Fachini, P. (Brookhaven) ; Fatemi, R. (Kentucky U.) ; Fedorisin, J. (Dubna, JINR) ; Fersch, R.G. (Kentucky U.) ; Filip, P. (Dubna, JINR) ; Finch, E. (Yale U.) ; Fine, V. (Brookhaven) ; Fisyak, Y. (Brookhaven) ; Gagliardi, C.A. (Texas A-M) ; Gangadharan, D.R. (UCLA) ; Ganti, M.S. (Calcutta, VECC) ; Garcia-Solis, E.J. (Illinois U., Chicago) ; Geromitsos, A. (SUBATECH, Nantes) ; Geurts, F. (Rice U.) ; Ghazikhanian, V. (UCLA) ; Ghosh, P. (Calcutta, VECC) ; Gorbunov, Y.N. (Creighton U.) ; Gordon, A. (Brookhaven) ; Grebenyuk, O. (LBL, Berkeley) ; Grosnick, D. (Valparaiso U., Indiana) ; Guertin, S.M. (UCLA) ; Gupta, A. (Jammu U.) ; Gupta, N. (Jammu U.) ; Guryn, W. (Brookhaven) ; Haag, B. (UC, Davis) ; Hamed, A. (Texas A-M) ; Han, L-X. (SINAP, Shanghai) ; Harris, J.W. (Yale U.) ; Hays-Wehle, J.P. (MIT) ; Heinz, M. (Yale U.) ; Heppelmann, S. (Penn State U.) ; Hirsch, A. (Purdue U.) ; Hjort, E. (LBL, Berkeley) ; Hoffman, A.M. (MIT) ; Hoffmann, G.W. (Texas U.) ; Hofman, D.J. (Illinois U., Chicago) ; Huang, B. (Hefei, CUST) ; Huang, H.Z. (UCLA) ; Humanic, T.J. (Ohio State U.) ; Huo, L. (Texas A-M) ; Igo, G. (UCLA) ; Jacobs, P. (LBL, Berkeley) ; Jacobs, W.W. (Indiana U., IUCF) ; Jena, C. (Bhubaneswar, Inst. Phys.) ; Jin, F. (SINAP, Shanghai) ; Jones, C.L. (MIT) ; Jones, P.G. (Birmingham U.) ; Joseph, J. (Kent State U.) ; Judd, E.G. (UC, Berkeley) ; Kabana, S. (SUBATECH, Nantes) ; Kajimoto, K. (Texas U.) ; Kang, K. (Tsinghua U., Beijing) ; Kapitan, J. (Rez, Nucl. Phys. Inst.) ; Kauder, K. (Illinois U., Chicago) ; Keane, D. (Kent State U.) ; Kechechyan, A. (Dubna, JINR) ; Kettler, D. (Washington U., Seattle) ; Kikola, D.P. (LBL, Berkeley) ; Kiryluk, J. (LBL, Berkeley) ; Kisiel, A. (Warsaw U. of Tech.) ; Klein, S.R. (LBL, Berkeley) ; Knospe, A.G. (Yale U.) ; Kocoloski, A. (MIT) ; Koetke, D.D. (Valparaiso U., Indiana) ; Kollegger, T. (Frankfurt U.) ; Konzer, J. (Purdue U.) ; Koralt, I. (Old Dominion U.) ; Koroleva, L. (Moscow, ITEP) ; Korsch, W. (Kentucky U.) ; Kotchenda, L. (Moscow Phys. Eng. Inst.) ; Kouchpil, V. (Rez, Nucl. Phys. Inst.) ; Kravtsov, P. (Moscow Phys. Eng. Inst.) ; Krueger, K. (Argonne) ; Krus, M. (Prague, Tech. U.) ; Kumar, L. (Kent State U.) ; Kurnadi, P. (UCLA) ; Lamont, M.A.C. (Brookhaven) ; Landgraf, J.M. (Brookhaven) ; LaPointe, S. (Wayne State U.) ; Lauret, J. (Brookhaven) ; Lebedev, A. (Brookhaven) ; Lednicky, R. (Dubna, JINR) ; Lee, C-H. (Pusan Natl. U.) ; Lee, J.H. (Brookhaven) ; Leight, W. (MIT) ; LeVine, M.J. (Brookhaven) ; Li, C. (Hefei, CUST) ; Li, L. (Texas U.) ; Li, N. (Hua-Zhong Normal U.) ; Li, W. (SINAP, Shanghai) ; Li, X. (Shandong U.) ; Li, X. (Purdue U.) ; Li, Y. (Tsinghua U., Beijing) ; Li, Z.M. (Hua-Zhong Normal U.) ; Lin, G. (Yale U.) ; Lindenbaum, S.J. (City Coll., N.Y.) ; Lisa, M.A. (Ohio State U.) ; Liu, F. (Hua-Zhong Normal U.) ; Liu, H. (UC, Davis) ; Liu, J. (Rice U.) ; Ljubicic, T. (Brookhaven) ; Llope, W.J. (Rice U.) ; Longacre, R.S. (Brookhaven) ; Love, W.A. (Brookhaven) ; Lu, Y. (Hefei, CUST) ; Luo, X. (Hefei, CUST) ; Ma, G.L. (SINAP, Shanghai) ; Ma, Y.G. (SINAP, Shanghai) ; Mahapatra, D.P. (Bhubaneswar, Inst. Phys.) ; Majka, R. (Yale U.) ; Mall, O.I. (UC, Davis) ; Mangotra, L.K. (Jammu U.) ; Manweiler, R. (Valparaiso U., Indiana) ; Margetis, S. (Kent State U.) ; Markert, C. (Texas U.) ; Masui, H. (LBL, Berkeley) ; Matis, H.S. (LBL, Berkeley) ; Matulenko, Yu.A. (Serpukhov, IHEP) ; McDonald, D. (Rice U.) ; McShane, T.S. (Creighton U.) ; Meschanin, A. (Serpukhov, IHEP) ; Milner, R. (MIT) ; Minaev, N.G. (Serpukhov, IHEP) ; Mioduszewski, S. (Texas A-M) ; Mischke, A. (NIKHEF, Amsterdam) ; Mitrovski, M.K. (Frankfurt U.) ; Mohanty, B. (Calcutta, VECC) ; Mondal, M.M. (Calcutta, VECC) ; Morozov, B. (Moscow, ITEP) ; Morozov, D.A. (Serpukhov, IHEP) ; Munhoz, M.G. (Sao Paulo U.) ; Nandi, B.K. (Indian Inst. Tech., Mumbai) ; Nattrass, C. (Yale U.) ; Nayak, T.K. (Calcutta, VECC) ; Nelson, J.M. (Birmingham U.) ; Netrakanti, P.K. (Purdue U.) ; Ng, M.J. (UC, Berkeley) ; Nogach, L.V. (Serpukhov, IHEP) ; Nurushev, S.B. (Serpukhov, IHEP) ; Odyniec, G. (LBL, Berkeley) ; Ogawa, A. (Brookhaven) ; Okorokov, V. (Moscow Phys. Eng. Inst.) ; Oldag, E.W. (Texas U.) ; Olson, D. (LBL, Berkeley) ; Pachr, M. (Prague, Tech. U.) ; Page, B.S. (Indiana U., IUCF) ; Pal, S.K. (Calcutta, VECC) ; Pandit, Y. (Kent State U.) ; Panebratsev, Y. (Dubna, JINR) ; Pawlak, T. (Warsaw U. of Tech.) ; Peitzmann, T. (NIKHEF, Amsterdam) ; Perevoztchikov, V. (Brookhaven) ; Perkins, C. (UC, Berkeley) ; Peryt, W. (Warsaw U. of Tech.) ; Phatak, S.C. (Bhubaneswar, Inst. Phys.) ; Pile, P. (Brookhaven) ; Planinic, M. (Zagreb U., Phys. Dept.) ; Ploskon, M.A. (LBL, Berkeley) ; Pluta, J. (Warsaw U. of Tech.) ; Plyku, D. (Old Dominion U.) ; Poljak, N. (Zagreb U., Phys. Dept.) ; Poskanzer, A.M. (LBL, Berkeley) ; Potukuchi, B.V.K.S. (Jammu U.) ; Powell, C.B. (LBL, Berkeley) ; Prindle, D. (Washington U., Seattle) ; Pruneau, C. (Wayne State U.) ; Pruthi, N.K. (Panjab U.) ; Pujahari, P.R. (Indian Inst. Tech., Mumbai) ; Putschke, J. (Yale U.) ; Raniwala, R. (Rajasthan U.) ; Raniwala, S. (Rajasthan U.) ; Ray, R.L. (Texas U.) ; Redwine, R. (MIT) ; Reed, R. (UC, Davis) ; Ritter, H.G. (LBL, Berkeley) ; Roberts, J.B. (Rice U.) ; Rogachevskiy, O.V. (Dubna, JINR) ; Romero, J.L. (UC, Davis) ; Rose, A. (LBL, Berkeley) ; Roy, C. (SUBATECH, Nantes) ; Ruan, L. (Brookhaven) ; Sahoo, R. (SUBATECH, Nantes) ; Sakai, S. (UCLA) ; Sakrejda, I. (LBL, Berkeley) ; Sakuma, T. (MIT) ; Salur, S. (UC, Davis) ; Sandweiss, J. (Yale U.) ; Sangaline, E. (UC, Davis) ; Schambach, J. (Texas U.) ; Scharenberg, R.P. (Purdue U.) ; Schmitz, N. (Munich, Max Planck Inst.) ; Schuster, T.R. (Frankfurt U.) ; Seele, J. (MIT) ; Seger, J. (Creighton U.) ; Selyuzhenkov, I. (Indiana U., IUCF) ; Seyboth, P. (Munich, Max Planck Inst.) ; Shahaliev, E. (Dubna, JINR) ; Shao, M. (Hefei, CUST) ; Sharma, M. (Wayne State U.) ; Shi, S.S. (Hua-Zhong Normal U.) ; Sichtermann, E.P. (LBL, Berkeley) ; Simon, F. (Munich, Max Planck Inst.) ; Singaraju, R.N. (Calcutta, VECC) ; Skoby, M.J. (Purdue U.) ; Smirnov, N. (Yale U.) ; Sorensen, P. (Brookhaven) ; Sowinski, J. (Indiana U., IUCF) ; Spinka, H.M. (Argonne) ; Srivastava, B. (Purdue U.) ; Stanislaus, T.D.S. (Valparaiso U., Indiana) ; Staszak, D. (UCLA) ; Stevens, J.R. (Indiana U., IUCF) ; Stock, R. (Frankfurt U.) ; Strikhanov, M. (Moscow Phys. Eng. Inst.) ; Stringfellow, B. (Purdue U.) ; Suaide, A.A.P. (Sao Paulo U.) ; Suarez, M.C. (Illinois U., Chicago) ; Subba, N.L. (Kent State U.) ; Sumbera, M. (Rez, Nucl. Phys. Inst.) ; Sun, X.M. (LBL, Berkeley) ; Sun, Y. (Hefei, CUST) ; Sun, Z. (Lanzhou, Inst. Modern Phys.) ; Surrow, B. (MIT) ; Svirida, D.N. (Moscow, ITEP) ; Symons, T.J.M. (LBL, Berkeley) ; Szanto de Toledo, A. (Sao Paulo U.) ; Takahashi, J. (Campinas State U.) ; Tang, A.H. (Brookhaven) ; Tang, Z. (Hefei, CUST) ; Tarini, L.H. (Wayne State U.) ; Tarnowsky, T. (Michigan State U.) ; Thein, D. (Texas U.) ; Thomas, J.H. (LBL, Berkeley) ; Tian, J. (SINAP, Shanghai) ; Timmins, A.R. (Wayne State U.) ; Timoshenko, S. (Moscow Phys. Eng. Inst.) ; Tlusty, D. (Rez, Nucl. Phys. Inst.) ; Tokarev, M. (Dubna, JINR) ; Tram, V.N. (LBL, Berkeley) ; Trentalange, S. (UCLA) ; Tribble, R.E. (Texas A-M) ; Tsai, O.D. (UCLA) ; Ulery, J. (Purdue U.) ; Ullrich, T. (Brookhaven) ; Underwood, D.G. (Argonne) ; Van Buren, G. (Brookhaven) ; van Leeuwen, M. (NIKHEF, Amsterdam) ; van Nieuwenhuizen, G. (MIT) ; J.A.Vanfossen, Jr. (Kent State U.) ; Varma, R. (Indian Inst. Tech., Mumbai) ; Vasconcelos, G.M.S. (Campinas State U.) ; Vasiliev, A.N. (Serpukhov, IHEP) ; Videbaek, F. (Brookhaven) ; Viyogi, Y.P. (Calcutta, VECC) ; Vokal, S. (Dubna, JINR) ; Voloshin, S.A. (Wayne State U.) ; Wada, M. (Texas U.) ; Walker, M. (MIT) ; Wang, F. (Purdue U.) ; Wang, G. (UCLA) ; Wang, H. (Michigan State U.) ; Wang, J.S. (Lanzhou, Inst. Modern Phys.) ; Wang, Q. (Purdue U.) ; Wang, X.L. (Hefei, CUST) ; Wang, Y. (Tsinghua U., Beijing) ; Webb, G. (Kentucky U.) ; Webb, J.C. (Brookhaven) ; Westfall, G.D. (Michigan State U.) ; Whitten, C., Jr. (UCLA) ; Wieman, H. (LBL, Berkeley) ; Wissink, S.W. (Indiana U., IUCF) ; Witt, R. (Naval Academy, Annapolis) ; Wu, Y.F. (Hua-Zhong Normal U.) ; Xie, W. (Purdue U.) ; Xu, N. (LBL, Berkeley) ; Xu, Q.H. (Shandong U.) ; Xu, W. (UCLA) ; Xu, Y. (Hefei, CUST) ; Xu, Z. (Brookhaven) ; Xue, L. (SINAP, Shanghai) ; Yang, Y. (Lanzhou, Inst. Modern Phys.) ; Yepes, P. (Rice U.) ; Yip, K. (Brookhaven) ; Yoo, I-K. (Pusan Natl. U.) ; Yue, Q. (Tsinghua U., Beijing) ; Zawisza, M. (Warsaw U. of Tech.) ; Zbroszczyk, H. (Warsaw U. of Tech.) ; Zhan, W. (Lanzhou, Inst. Modern Phys.) ; Zhang, J.B. (Hua-Zhong Normal U.) ; Zhang, S. (SINAP, Shanghai) ; Zhang, W.M. (Kent State U.) ; Zhang, X.P. (LBL, Berkeley) ; Zhang, Y. (LBL, Berkeley) ; Zhang, Z.P. (Hefei, CUST) ; Zhao, J. (SINAP, Shanghai) ; Zhong, C. (SINAP, Shanghai) ; Zhou, J. (Rice U.) ; Zhou, W. (Shandong U.) ; Zhu, X. (Tsinghua U., Beijing) ; Zhu, Y.H. (SINAP, Shanghai) ; Zoulkarneev, R. (Dubna, JINR) ; Zoulkarneeva, Y. (Dubna, JINR)

Published in: Phys.Rev.
Year: 2010
Vol.: C82
Page No: 024905
Pages: 17

Abstract: Balance functions have been measured for charged particle pairs, identified charged pion pairs, and identified charged kaon pairs in Au+Au, d+Au, and p+p collisions at $\sqrt{s_{NN}}$ = 200 GeV at the Relativistic Heavy Ion Collider using the STAR detector. These balance functions are presented in terms of relative pseudorapidity, $\Delta \eta$, relative rapidity, $\Delta y$, relative azimuthal angle, $\Delta \phi$, and invariant relative momentum, $q_{\rm inv}$. In addition, balance functions are shown in terms of the three components of $q_{\rm inv}$: $q_{\rm long}$, $q_{\rm out}$, and $q_{\rm side}$. For charged particle pairs, the width of the balance function in terms of $\Delta \eta$ scales smoothly with the number of participating nucleons, while HIJING and UrQMD model calculations show no dependence on centrality or system size. For charged particle and charged pion pairs, the balance functions widths in terms of $\Delta \eta$ and $\Delta y$ are narrower in central Au+Au collisions than in peripheral collisions. The width for central collisions is consistent with thermal blast-wave models where the balancing charges are highly correlated in coordinate space at breakup. This strong correlation might be explained either by delayed hadronization or by limited diffusion during the reaction. Furthermore, the narrowing trend is consistent with the lower kinetic temperatures inherent to more central collisions. In contrast, the width of the balance function for charged kaon pairs in terms of $\Delta y$ shows little centrality dependence, which may signal a different production mechanism for kaons. The widths of the balance functions for charged pions and kaons in terms of $q_{\rm inv}$ narrow in central collisions compared to peripheral collisions, which may be driven by the change in the kinetic temperature.

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