Energy dependence of acceptance-corrected dielectron excess mass spectrum at mid-rapidity in Au plus Au collisions at root(NN)-N-S=19.6 and 200 GeV

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	Energy dependence of acceptance-corrected dielectron excess mass spectrum at mid-rapidity in Au plus Au collisions at root(NN)-N-S=19.6 and 200 GeV
	Adamczyk, L; Adkins, JK; Agakishiev, G; Aggarwal, MM; Ahammed, Z; Alekseev, I; Alford, J; Aparin, A; Arkhipkin, D; Aschenauer, EC
刊名	PHYSICS LETTERS B
	2015
卷号	750 页码:64—71
关键词	NUCLEUS-NUCLEUS COLLISIONS RESISTIVE PLATE CHAMBERS QUARK-GLUON PLASMA CHIRAL RESTORATION CROSS-SECTIONS CERN-SPS STAR DILEPTONS MATTER COLLABORATION
ISSN号	0370-2693
通讯作者	Huang, B (reprint author), Univ Illinois, Chicago, IL 60607 USA.
英文摘要	The acceptance-corrected dielectron excess mass spectra, where the known hadronic sources have been subtracted from the inclusive dielectron mass spectra, are reported for the first time at mid-rapidity vertical bar Y-ee vertical bar <1 in minimum-bias Au + Au collisions at root(NN)-N-S and 200 GeV. The excess mass spectra are consistently described by a model calculation with a broadened p spectral function for Mee <1.1 GeV/c2. The integrated dielectron excess yield at root(NN)-N-S= 19.6 GeV for 0.4 < M-ee <0.75 GeV/c(2), normalized to the charged particle multiplicity at mid-rapidity, has a value similar to that in In + In collisions at root(NN)-N-S = 17.3 GeV. For root(NN)-N-S = 200 GeV, the normalized excess yield in central collisions is higher than that at root(NN)-N-S = 17.3 GeV and increases from peripheral to central collisions. These measurements indicate that the lifetime of the hot, dense medium created in central Au + Au collisions at root(NN)-N-S = 200 GeV is longer than those in peripheral collisions and at lower energies. (C) 2015 The Authors. Published by Elsevier B.V.
收录类别	SCI
语种	英语
WOS记录号	WOS:000364250600013
公开日期	2016-03-08
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/24916]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
推荐引用方式 GB/T 7714	Adamczyk, L,Adkins, JK,Agakishiev, G,et al. Energy dependence of acceptance-corrected dielectron excess mass spectrum at mid-rapidity in Au plus Au collisions at root(NN)-N-S=19.6 and 200 GeV[J]. PHYSICS LETTERS B,2015,750:64—71.
APA	Adamczyk, L.,Adkins, JK.,Agakishiev, G.,Aggarwal, MM.,Ahammed, Z.,...&Zyzak, M.(2015).Energy dependence of acceptance-corrected dielectron excess mass spectrum at mid-rapidity in Au plus Au collisions at root(NN)-N-S=19.6 and 200 GeV.PHYSICS LETTERS B,750,64—71.
MLA	Adamczyk, L,et al."Energy dependence of acceptance-corrected dielectron excess mass spectrum at mid-rapidity in Au plus Au collisions at root(NN)-N-S=19.6 and 200 GeV".PHYSICS LETTERS B 750(2015):64—71.