Mass, quark-number, and root s(NN) dependence of the second and fourth flow harmonics in ultrarelativistic nucleus-nucleus collisions
文献类型：期刊论文
| 作者 | Abelev, B. I.; Aggarwal, M. M.; Ahammed, Z.; Anderson, B. D.; Arkhipkin, D.; Averichev, G. S.; Bai, Y.; Balewski, J.; Barannikova, O.; Barnby, L. S. |
| 刊名 | PHYSICAL REVIEW C
 |
| 出版日期 | 2007-05-01 |
| 卷号 | 75页码:11 |
| ISSN号 | 0556-2813 |
| DOI | 10.1103/PhysRevC.75.054906 |
| 英文摘要 | We present STAR measurements of the azimuthal anisotropy parameter v(2) for pions, kaons, protons, Lambda,(Lambda) over bar,Xi+ (Xi) over bar, and Omega+ (Omega) over bar, along with v(4) for pions, kaons, protons, and Lambda+(Lambda) over bar at midrapidity for Au+Au collisions at root s(NN)=62.4 and 200 GeV. The v(2)(p(T)) values for all hadron species at 62.4 GeV are similar to those observed in 130 and 200 GeV collisions. For observed kinematic ranges, v(2) values at 62.4, 130, and 200 GeV are as little as 10-15% larger than those in Pb+Pb collisions at root s(NN)=17.3 GeV. At intermediate transverse momentum (p(T) from 1.5-5 GeV/c), the 62.4 GeV v(2)(p(T)) and v(4)(p(T)) values are consistent with the quark-number scaling first observed at 200 GeV. A four-particle cumulant analysis is used to assess the nonflow contributions to pions and protons and some indications are found for a smaller nonflow contribution to protons than pions. Baryon v(2) is larger than antibaryon v(2) at 62.4 and 200 GeV, perhaps indicating either that the initial spatial net-baryon distribution is anisotropic, that the mechanism leading to transport of baryon number from beam- to midrapidity enhances v(2) or that antibaryon and baryon annihilation is larger in the in-plane direction. |
| WOS关键词 | ELLIPTIC FLOW ; ANISOTROPIC FLOW ; PARTICLE IDENTIFICATION ; SIGNATURE ; STAR |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000246891100058 |
| 出版者 | AMER PHYSICAL SOC |
| 源URL | [http://119.78.100.186/handle/113462/27671]  |
| 专题 | 中国科学院近代物理研究所 |
| 通讯作者 | Abelev, B. I. |
| 作者单位 | 1.Yale Univ, New Haven, CT 06520 USA 2.Carnegie Mellon Univ, Pittsburgh, PA 15213 USA 3.Univ Illinois, Chicago, IL USA 4.Creighton Univ, Omaha, NE 68178 USA 5.Acad Sci Czech Republic, Inst Nucl Phys, CZ-25068 Rez, Czech Republic 6.JINR, Lab High Energy, Dubna, Russia 7.JINR, Particle Phys Lab, Dubna, Russia 8.Goethe Univ Frankfurt, D-6000 Frankfurt, Germany 9.Inst Phys, Bhubaneswar 751005, Orissa, India 10.Indian Inst Technol, Bombay 400076, Maharashtra, India |
| 推荐引用方式 GB/T 7714 | Abelev, B. I.,Aggarwal, M. M.,Ahammed, Z.,et al. Mass, quark-number, and root s(NN) dependence of the second and fourth flow harmonics in ultrarelativistic nucleus-nucleus collisions[J]. PHYSICAL REVIEW C,2007,75:11. |
| APA | Abelev, B. I..,Aggarwal, M. M..,Ahammed, Z..,Anderson, B. D..,Arkhipkin, D..,...&Zuo, J. X..(2007).Mass, quark-number, and root s(NN) dependence of the second and fourth flow harmonics in ultrarelativistic nucleus-nucleus collisions.PHYSICAL REVIEW C,75,11. |
| MLA | Abelev, B. I.,et al."Mass, quark-number, and root s(NN) dependence of the second and fourth flow harmonics in ultrarelativistic nucleus-nucleus collisions".PHYSICAL REVIEW C 75(2007):11. |
入库方式： OAI收割
来源：近代物理研究所
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