Energy and system size dependence of phi meson production in Cu plus Cu and Au plus Au collisions
文献类型：期刊论文
| 作者 | Abelev, B. I.10; Aggarwal, M. M.33; Ahammed, Z.1; Anderson, B. D.20; Arkhipkin, D.14; Averichev, G. S.13; Bai, Y.29,30; Balewski, J.24; Barannikova, O.10; Barnsby, L. S.3 |
| 刊名 | PHYSICS LETTERS B
 |
| 出版日期 | 2009-03-23 |
| 卷号 | 673页码:183-191 |
| 关键词 | Particle production Strangeness enhancement Canonical suppression Quark-gluon plasma Resonances |
| ISSN号 | 0370-2693 |
| DOI | 10.1016/j.physletb.2009.02.037 |
| 英文摘要 | 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 <(A)over bar>) 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 Elsevier B.V. All rights reserved. |
| WOS关键词 | QUARK-GLUON PLASMA ; HEAVY-ION COLLISIONS ; PROTON-PROTON COLLISIONS ; STRANGENESS ENHANCEMENT ; NUCLEUS COLLISIONS ; PP COLLISIONS ; MODEL ; RULE ; COLLABORATION ; CONSERVATION |
| 资助项目 | Offices of NP and HEP ; US NSF ; Sloan Foundation ; DFG Excellence Cluster EXC153 of Germany ; CNRS/IN2P3 ; RA ; RPL ; EMN of France ; STFC and EPSRC of the United Kingdom ; FAPESP of Brazil ; Russian Ministry of Sci. and Tech. ; NNSFC of China ; CAS of China ; MoST of China ; MoE of China ; IRP and GA of the Czech Republic ; FOM of the Netherlands ; DAE of the Government of India ; DST of the Government of India ; CSIR of the Government of India ; Swiss NSF ; Polish State Committee for Scientific Research ; Korea Sci. & Eng. Foundation |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000264790700003 |
| 出版者 | ELSEVIER SCIENCE BV |
| 资助机构 | Offices of NP and HEP ; US NSF ; Sloan Foundation ; DFG Excellence Cluster EXC153 of Germany ; CNRS/IN2P3 ; RA ; RPL ; EMN of France ; STFC and EPSRC of the United Kingdom ; FAPESP of Brazil ; Russian Ministry of Sci. and Tech. ; NNSFC of China ; CAS of China ; MoST of China ; MoE of China ; IRP and GA of the Czech Republic ; FOM of the Netherlands ; DAE of the Government of India ; DST of the Government of India ; CSIR of the Government of India ; Swiss NSF ; Polish State Committee for Scientific Research ; Korea Sci. & Eng. Foundation |
| 源URL | [http://119.78.100.186/handle/113462/31459]  |
| 专题 | 中国科学院近代物理研究所 |
| 通讯作者 | Mohanty, B. |
| 作者单位 | 1.Bhabha Atom Res Ctr, Ctr Variable Energy Cyclotron, Kolkata 700064, W Bengal, 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.Carnegie Mellon Univ, Pittsburgh, PA 15213 USA 10.Univ Illinois, Chicago, IL 60607 USA |
| 推荐引用方式 GB/T 7714 | Abelev, B. I.,Aggarwal, M. M.,Ahammed, Z.,et al. Energy and system size dependence of phi meson production in Cu plus Cu and Au plus Au collisions[J]. PHYSICS LETTERS B,2009,673:183-191. |
| APA | Abelev, B. I..,Aggarwal, M. M..,Ahammed, Z..,Anderson, B. D..,Arkhipkin, D..,...&Zuo, J. X..(2009).Energy and system size dependence of phi meson production in Cu plus Cu and Au plus Au collisions.PHYSICS LETTERS B,673,183-191. |
| MLA | Abelev, B. I.,et al."Energy and system size dependence of phi meson production in Cu plus Cu and Au plus Au collisions".PHYSICS LETTERS B 673(2009):183-191. |
入库方式： OAI收割
来源：近代物理研究所
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