Measurements of φ meson production in relativistic heavy-ion collisions at the BNL Relativistic Heavy Ion Collider (RHIC)

被引:73
作者
Abelev, B. I. [8 ]
Aggarwal, M. M. [29 ]
Ahammed, Z. [45 ]
Anderson, B. D. [18 ]
Arkhipkin, D. [12 ]
Averichev, G. S. [11 ]
Bai, Y. [27 ,53 ]
Balewski, J. [22 ]
Barannikova, O. [8 ]
Barnby, L. S. [52 ]
Baudot, J. [16 ]
Baumgart, S. [50 ]
Beavis, D. R. [2 ]
Bellwied, R. [48 ]
Benedosso, F. [27 ,53 ]
Betts, R. R. [8 ]
Bhardwaj, S. [34 ]
Bhasin, A. [17 ]
Bhati, A. K. [29 ]
Bichsel, H. [47 ]
Bielcik, J. [10 ]
Bielcikova, J. [10 ]
Biritz, B. [5 ]
Bland, L. C. [2 ]
Blyth, S. -L. [21 ]
Bombara, M. [52 ]
Bonner, B. E. [35 ]
Botje, M. [27 ,53 ]
Bouchet, J. [18 ]
Braidot, E. [27 ,53 ]
Brandin, A. V. [25 ]
Bruna, E. [50 ]
Bueltmann, S. [2 ]
Burton, T. P. [52 ]
Bystersky, M. [10 ]
Cai, X. Z. [38 ]
Caines, H. [50 ]
Sanchez, M. Calderon de la Barca [4 ]
Callner, J. [8 ]
Catu, O. [50 ]
Cebra, D. [4 ]
Cendejas, R. [5 ]
Cervantes, M. C. [40 ]
Chajecki, Z. [28 ]
Chaloupka, P. [10 ]
Chattopadhyay, S. [45 ]
Chen, H. F. [37 ]
Chen, J. H. [38 ]
Chen, J. Y. [49 ]
Cheng, J. [42 ]
机构
[1] Argonne Natl Lab, Argonne, IL 60439 USA
[2] Brookhaven Natl Lab, Upton, NY 11973 USA
[3] Univ Calif Berkeley, Berkeley, CA 94720 USA
[4] Univ Calif Davis, Davis, CA 95616 USA
[5] Univ Calif Los Angeles, Los Angeles, CA 90095 USA
[6] Univ Estadual Campinas, Sao Paulo, Brazil
[7] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA
[8] Univ Illinois, Chicago, IL 60607 USA
[9] Creighton Univ, Omaha, NE 68178 USA
[10] AS CR, Inst Nucl Phys, CZ-25068 Rez, Czech Republic
[11] Joint Inst Nucl Res Dubna, Lab High Energy, Dubna, Russia
[12] Joint Inst Nucl Res Dubna, Particle Phys Lab, Dubna, Russia
[13] Inst Phys, Bhubaneswar 751005, Orissa, India
[14] Indian Inst Technol, Mumbai 400076, Maharashtra, India
[15] Indiana Univ, Bloomington, IN 47408 USA
[16] Inst Rech Subatom, Strasbourg, France
[17] Univ Jammu, Jammu 180001, India
[18] Kent State Univ, Kent, OH 44242 USA
[19] Univ Kentucky, Lexington, KY 40506 USA
[20] Inst Modern Phys, Lanzhou, Peoples R China
[21] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA
[22] MIT, Cambridge, MA 02139 USA
[23] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany
[24] Michigan State Univ, E Lansing, MI 48824 USA
[25] Moscow Engn Phys Inst, Moscow 115409, Russia
[26] CUNY City Coll, New York, NY 10031 USA
[27] NIKHEF, Amsterdam, Netherlands
[28] Ohio State Univ, Columbus, OH 43210 USA
[29] Panjab Univ, Chandigarh 160014, India
[30] Penn State Univ, University Pk, PA 16802 USA
[31] Inst High Energy Phys, Protvino, Russia
[32] Purdue Univ, W Lafayette, IN 47907 USA
[33] Pusan Natl Univ, Pusan 609735, South Korea
[34] Univ Rajasthan, Jaipur 302004, Rajasthan, India
[35] Rice Univ, Houston, TX 77251 USA
[36] Univ Sao Paulo, Sao Paulo, Brazil
[37] Univ Sci & Technol China, Hefei 230026, Peoples R China
[38] Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China
[39] SUBATECH, Nantes, France
[40] Texas A&M Univ, College Stn, TX 77843 USA
[41] Univ Texas Austin, Austin, TX 78712 USA
[42] Tsinghua Univ, Beijing 100084, Peoples R China
[43] USN Acad, Annapolis, MD 21402 USA
[44] Valparaiso Univ, Valparaiso, IN 46383 USA
[45] Ctr Variable Energy Cyclotron, Kolkata 700064, India
[46] Warsaw Univ Technol, Warsaw, Poland
[47] Univ Washington, Seattle, WA 98195 USA
[48] Wayne State Univ, Detroit, MI 48201 USA
[49] HZNU, CCNU, Inst Particle Phys, Wuhan 430079, Peoples R China
[50] Yale Univ, New Haven, CT 06520 USA
来源
PHYSICAL REVIEW C | 2009年 / 79卷 / 06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
LARGE TRANSVERSE-MOMENTUM; QUARK-GLUON-PLASMA; NUCLEUS-NUCLEUS COLLISIONS; TIME PROJECTION CHAMBER; ELLIPTIC FLOW; STRANGENESS PRODUCTION; PHASE-TRANSITION; D+AU COLLISIONS; PB COLLISIONS; HADRON;
D O I
10.1103/PhysRevC.79.064903
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
We present results for the measurement of phi meson production via its charged kaon decay channel phi -> K+ K- Au + Au collisions at root S-NN = 62.4, 130, and 200 GeV, and in p + p and d + Au collisions at v root S-NN = 200 GeV from the STAR experiment at the BNL Relativistic Heavy Ion Collider (RHIC). The midrapidity (vertical bar y vertical bar < 0.5) phi meson transverse momentum (p(T)) spectra in central Au + Au collisions are found to be well described by a single exponential distribution. On the other hand, the p(T) spectra from p + p, d + Au, and peripheral Au + Au collisions show power-law tails at intermediate and high p(T) and are described better by Levy distributions. The constant phi/K- yield ratio vs beam species, collision centrality, and colliding energy is in contradiction with expectations from models having kaon coalescence as the dominant mechanism for phi production at RHIC. The Omega/phi yield ratio as a function of p(T) is consistent with a model based on the recombination of thermal s quarks up to p(T) similar to 4 GeV/c, but disagrees at higher transverse momenta. The measured nuclear modification factor, R-dAu, for the phi meson increases above unity at intermediate p(T), similar to that for pions and protons, while R-AA is suppressed due to the energy loss effect in central Au + Au collisions. Number of constituent quark scaling of both R-cp and nu(2) for the phi meson with respect to other hadrons in Au + Au collisions at root S-NN = 200 GeV at intermediate pT is observed. These observations support quark coalescence as being the dominant mechanism of hadronization in the intermediate p(T) region at RHIC.
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页数:20
相关论文
共 117 条
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