Balance functions from Au+Au, d+Au, and p+p collisions at √sNN=200 GeV

被引：56

作者：

Aggarwal, M. M. ^{[1
]}

Ahammed, Z. ^{[23
]}

Alakhverdyants, A. V. ^{[19
]}

Alekseev, I. ^{[17
]}

Alford, J. ^{[20
]}

Anderson, B. D. ^{[10
,20
]}

Arkhipkin, D. ^{[4
]}

Averichev, G. S. ^{[19
]}

Balewski, J. ^{[24
]}

Barnby, L. S. ^{[3
]}

Baumgart, S. ^{[52
]}

Beavis, D. R. ^{[4
]}

Bellwied, R.

Betancourt, M. J. ^{[24
]}

Betts, R. R. ^{[9
]}

Bhasin, A. ^{[18
]}

Bhati, A. K. ^{[1
]}

Bichsel, H. ^{[50
]}

Bielcik, J. ^{[11
]}

Bielcikova, J. ^{[12
]}

Biritz, B. ^{[7
]}

Bland, L. C. ^{[4
]}

Bonner, B. E. ^{[38
]}

Bouchet, J. ^{[20
]}

Braidot, E. ^{[29
,30
]}

Brandin, A. V. ^{[27
]}

Bridgeman, A. ^{[2
]}

Bruna, E. ^{[52
]}

Bueltmann, S. ^{[32
]}

Bunzarov, I. ^{[19
]}

Burton, T. P. ^{[4
]}

Cai, X. Z. ^{[42
]}

Caines, H. ^{[52
]}

Sanchez, M. Calderon de la Barca ^{[6
]}

Catu, O. ^{[52
]}

Cebra, D. ^{[6
]}

Cendejas, R. ^{[7
]}

Cervantes, M. C. ^{[44
]}

Chajecki, Z. ^{[31
]}

Chaloupka, P. ^{[12
]}

Chattopadhyay, S. ^{[48
]}

Chen, H. F. ^{[40
]}

Chen, J. H. ^{[42
]}

Chen, J. Y. ^{[51
]}

Cheng, J. ^{[45
]}

Cherney, M. ^{[10
]}

Chikanian, A. ^{[52
]}

Choi, K. E. ^{[36
]}

Christie, W. ^{[4
]}

Chung, P. ^{[12
]}

机构：

[1] Panjab Univ, Chandigarh 160014, India

[2] Argonne Natl Lab, Argonne, IL 60439 USA

[3] Univ Birmingham, Birmingham, W Midlands, England

[4] Brookhaven Natl Lab, Upton, NY 11973 USA

[5] Univ Calif Berkeley, Berkeley, CA 94720 USA

[6] Univ Calif Davis, Davis, CA 95616 USA

[7] Univ Calif Los Angeles, Los Angeles, CA 90095 USA

[8] Univ Estadual Campinas, Sao Paulo, Brazil

[9] Univ Illinois, Chicago, IL 60607 USA

[10] Creighton Univ, Omaha, NE 68178 USA

[11] Czech Tech Univ, FNSPE, CZ-115 Prague 19, Czech Republic

[12] Nucl Phys Inst CR, CZ-25068 Rez, Czech Republic

[13] Goethe Univ Frankfurt, Frankfurt, Germany

[14] Inst Phys, Bhubaneswar 751005, Orissa, India

[15] Indian Inst Technol, Mumbai 400076, Maharashtra, India

[16] Indiana Univ, Bloomington, IN 47408 USA

[17] Alikhanov Inst Theoret & Expt Phys, Moscow, Russia

[18] Univ Jammu, Jammu 180001, India

[19] Joint Inst Nucl Res, Dubna 141980, Russia

[20] Kent State Univ, Kent, OH 44242 USA

[21] Univ Kentucky, Lexington, KY 40506 USA

[22] Inst Modern Phys, Lanzhou, Peoples R China

[23] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA

[24] MIT, Cambridge, MA 02139 USA

[25] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany

[26] Michigan State Univ, E Lansing, MI 48824 USA

[27] Moscow Engn Phys Inst, Moscow, Russia

[28] CUNY, New York, NY 10031 USA

[29] Univ Utrecht, Amsterdam, Netherlands

[30] NIKHEF, Amsterdam, Netherlands

[31] Ohio State Univ, Columbus, OH 43210 USA

[32] Old Dominion Univ, Norfolk, VA 23529 USA

[33] Penn State Univ, University Pk, PA 16802 USA

[34] Inst High Energy Phys, Protvino, Russia

[35] Purdue Univ, W Lafayette, IN 47907 USA

[36] Pusan Natl Univ, Pusan 609735, South Korea

[37] Univ Rajasthan, Jaipur 302004, Rajasthan, India

[38] Rice Univ, Houston, TX 77251 USA

[39] Univ Sao Paulo, Sao Paulo, Brazil

[40] Univ Sci & Technol China, Anhua 230026, Peoples R China

[41] Shandong Univ, Jinan 250100, Shandong, Peoples R China

[42] Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China

[43] SUBATECH, Nantes, France

[44] Texas A&M Univ, College Stn, TX 77843 USA

[45] Univ Texas Austin, Austin, TX 78712 USA

[46] USN Acad, Annapolis, MD 21402 USA

[47] Valparaiso Univ, Valparaiso, IN 46383 USA

[48] Variable Energy Cyclotron Ctr, Kolkata 700064, India

[49] Warsaw Univ Technol, Warsaw, Poland

[50] Univ Washington, Seattle, WA 98195 USA

来源：

PHYSICAL REVIEW C | 2010年 / 82卷 / 02期

基金：

英国工程与自然科学研究理事会; 巴西圣保罗研究基金会;

关键词：

AU-AU COLLISIONS; BY-EVENT FLUCTUATIONS; HEAVY-ION COLLISIONS; TRANSVERSE-MOMENTUM; MEAN-P(T) FLUCTUATIONS; HADRONIZATION; SIGNATURES; DYNAMICS; PHI; ETA;

D O I：

10.1103/PhysRevC.82.024905

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

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 root 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(inv). 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 by either delayed hadronization or 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(inv) narrow in central collisions compared to peripheral collisions, which may be driven by the change in the kinetic temperature.

引用

页数：16

共 52 条

[31] Statistical and dynamic models of charge balance functions [J].