Energy dependence of pi(+/-), p and (p)over-bar transverse momentum spectra for Au+Au collisions at root SNN=62.4 and 200 GeV | |
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 | PHYSICS LETTERS B |
2007-11-01 | |
卷号 | 655页码:104-113 |
关键词 | particle production recombination fragmentation jet quenching nuclear modification factor particle ratios |
ISSN号 | 0370-2693 |
DOI | 10.1016/j.physletb.2007.06.035 |
英文摘要 | We study the energy dependense of the transverse momentum (PT) spectra for charged pions, protons and anti-protons for An + An collisions at root(NN)-N-s = 62.4 and 200 GeV. Data are presented at mid-rapidity (broken vertical bar y broken vertical bar < 0.5) for 0.2 < PT < 12 GeV/c. In the intermediate PT region (2 < PT < 6 GeV/c), the nuclear modification factor is higher at 62.4 GeV than at 200 GeV, while at higher PT (PT > 7 GeV/c) the modification is similar for both energies. The p/pi(+) and (p) over bar/pi(-) ratios for central collisions at root(NN)-N-s = 62.4 GeV peak at PT similar or equal to 2 GeV/c. In the PT range where recombination is expected to dominate, the p/pi(+) ratios at 62.4 GeV are larger than at 200 GeV, while the (p) over bar/pi(-) ratios are smaller. For PT > 2 GeV/c, the (p) over bar/pi(-) ratios at the two beam energies are independent of P-T and centrality indicating that the dependence of the (p) over bar/pi(-) ratio on P-T does not change between 62.4 and 200 GeV. These findings challenge various models incorporating jet quenching and/or constituent quark coalescence. (C) 2007 Elsevier B.V. All rights reserved. |
WOS关键词 | NUCLEUS-NUCLEUS COLLISIONS ; RESISTIVE PLATE CHAMBERS ; QUARK-GLUON PLASMA ; PARTICLE IDENTIFICATION ; HADRON-PRODUCTION ; D+AU COLLISIONS ; STAR EXPERIMENT ; JET ; COLLABORATION ; PROTON |
WOS研究方向 | Physics |
语种 | 英语 |
出版者 | ELSEVIER SCIENCE BV |
WOS记录号 | WOS:000251016300003 |
内容类型 | 期刊论文 |
源URL | [http://119.78.100.186/handle/113462/27696] |
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.Argonne Natl Lab, Argonne, IL 60439 USA 2.Univ Birmingham, Birmingham, W Midlands, England 3.Brookhaven Natl Lab, Upton, NY 11973 USA 4.CALTECH, Pasadena, CA 91125 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.Carnegie Mellon Univ, Pittsburgh, PA 15213 USA 9.Univ Illinois, Chicago, IL USA 10.Creighton Univ, Omaha, NE 68178 USA |
推荐引用方式 GB/T 7714 | Abelev, B. I.,Aggarwal, M. M.,Ahammed, Z.,et al. Energy dependence of pi(+/-), p and (p)over-bar transverse momentum spectra for Au+Au collisions at root SNN=62.4 and 200 GeV[J]. PHYSICS LETTERS B,2007,655:104-113. |
APA | Abelev, B. I..,Aggarwal, M. M..,Ahammed, Z..,Anderson, B. D..,Arkhipkin, D..,...&Zuo, J. X..(2007).Energy dependence of pi(+/-), p and (p)over-bar transverse momentum spectra for Au+Au collisions at root SNN=62.4 and 200 GeV.PHYSICS LETTERS B,655,104-113. |
MLA | Abelev, B. I.,et al."Energy dependence of pi(+/-), p and (p)over-bar transverse momentum spectra for Au+Au collisions at root SNN=62.4 and 200 GeV".PHYSICS LETTERS B 655(2007):104-113. |
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