Suppression of Upsilon production in d plus Au and Au plus Au collisions at root S-NN=200 GeV

doi:10.1016/j.physletb.2014.06.028

	Suppression of Upsilon production in d plus Au and Au plus Au collisions at root S-NN=200 GeV
	Adamczyk, L.1,55; Adkins, J. K.24; Agakishiev, G.22; Aggarwal, M. M.36; Ahammed, Z.; Alekseev, I.20; Alford, J.55; Anson, C. D.33; Aparin, A.15,22; Arkhipkin, D.4
刊名	PHYSICS LETTERS B
	2014-07-30
卷号	735 页码:127-137
关键词	Upsilon Suppression Quarkonium In-medium Relativistic Heavy-ion Collisions Star
ISSN号	0370-2693
DOI	10.1016/j.physletb.2014.06.028
文献子类	Article
英文摘要	We report measurements of Upsilon meson production in p + p, d + Au, and Au + Au collisions using the STAR detector at RHIC. We compare the Upsilon yield to the measured cross section in p + p collisions in order to quantify any modifications of the yield in cold nuclear matter using d + Au data and in hot nuclear matter using Au + Au data separated into three centrality classes. Our p + p measurement is based on three times the statistics of our previous result. We obtain a nuclear modification factor for Upsilon (1S + 2S + 3S) in the rapidity range vertical bar y vertical bar < 1 in d + Au collisions of R-dAu = 0.79 +/- 0.24(stat.) +/- 0.03(syst.) +/- 0.10(p + p syst.). A comparison with models including shadowing and initial state parton energy loss indicates the presence of additional cold-nuclear matter suppression. Similarly, in the top 10% most-central Au + Au collisions, we measure a nuclear modification factor of R-AA = 0.49 +/- 0.1(stat.) +/- 0.02(syst.) +/- 0.06(p + p syst.), which is a larger suppression factor than that seen in cold nuclear matter. Our results are consistent with complete suppression of excited-state Upsilon mesons in Au + Au collisions. The additional suppression in Au + Au is consistent with the level expected in model calculations that include the presence of a hot, deconfined Quark-Gluon Plasma. However, understanding the suppression seen in d + Au is still needed before any definitive statements about the nature of the suppression in Au + Au can be made. (C) 2014 The Authors. Published by Elsevier B.V.
资助项目	National Research Foundation[NRF-2012004024]
WOS关键词	HEAVY-ION COLLISIONS ; NUCLEUS COLLISIONS ; J/PSI ; ABSORPTION ; LHC
WOS研究方向	Astronomy & Astrophysics ; Physics
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000340048900023
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/49679]
专题	中国科学院近代物理研究所
通讯作者	Sanchez, M. Calderon de la Barca
作者单位	1.AGH Univ Sci & Technol, Krakow, Poland 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.Cent China Normal Univ HZNU, Wuhan 430079, Peoples R China 10.Univ Illinois, Chicago, IL 60607 USA
推荐引用方式 GB/T 7714	Adamczyk, L.,Adkins, J. K.,Agakishiev, G.,et al. Suppression of Upsilon production in d plus Au and Au plus Au collisions at root S-NN=200 GeV[J]. PHYSICS LETTERS B,2014,735:127-137.
APA	Adamczyk, L..,Adkins, J. K..,Agakishiev, G..,Aggarwal, M. M..,Ahammed, Z..,...&Star Collaboration.(2014).Suppression of Upsilon production in d plus Au and Au plus Au collisions at root S-NN=200 GeV.PHYSICS LETTERS B,735,127-137.
MLA	Adamczyk, L.,et al."Suppression of Upsilon production in d plus Au and Au plus Au collisions at root S-NN=200 GeV".PHYSICS LETTERS B 735(2014):127-137.