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Measurement of the centrality dependence of J/psi yields and observation of Z production in lead-lead collisions with the ATLAS detector at the LHC
ATLAS collaboration
2011
发表期刊PHYSICS LETTERS B
卷号697期号:4页码:294-312
通讯作者Arik, E (reprint author), Bogazici Univ, Dept Phys, Fac Sci, TR-80815 Bebek, Turkey.
摘要Using the ATLAS detector, a centrality-dependent suppression has been observed in the yield of J/psi mesons produced in the collisions of lead ions at the Large Hadron Collider. In a sample of minimum-bias lead-lead collisions at a nucleon-nucleon centre of mass energy root s(NN) = 2.76 TeV, corresponding to an integrated luminosity of about 6.7 mu b(-1), J/psi mesons are reconstructed via their decays to mu(+)mu(-) pairs. The measured J/psi yield, normalized to the number of binary nucleon-nucleon collisions, is found to significantly decrease from peripheral to central collisions. The centrality dependence is found to be qualitatively similar to the trends observed at previous, lower energy experiments. The same sample is used to reconstruct Z bosons in the mu(+)mu(-) final state, and a total of 38 candidates are selected in the mass window of 66 to 116 GeV. The relative Z yields as a function of centrality are also presented, although no conclusion can be inferred about their scaling with the number of binary collisions, because of limited statistics. This analysis provides the first results on J/psi and Z production in lead-lead collisions at the LHC. (C) 2011 CERN. Published by Elsevier B.V. All rights reserved.
关键词PROTON-NUCLEUS COLLISIONS SUPPRESSION ABSORPTION PP
学科领域Physics
DOI10.1016/j.physletb.2011.02.006
收录类别SCI
语种英语
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000288300400006
引用统计
被引频次:103[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/213023
专题实验物理中心
作者单位中国科学院高能物理研究所
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ATLAS collaboration. Measurement of the centrality dependence of J/psi yields and observation of Z production in lead-lead collisions with the ATLAS detector at the LHC[J]. PHYSICS LETTERS B,2011,697(4):294-312.
APA ATLAS collaboration.(2011).Measurement of the centrality dependence of J/psi yields and observation of Z production in lead-lead collisions with the ATLAS detector at the LHC.PHYSICS LETTERS B,697(4),294-312.
MLA ATLAS collaboration."Measurement of the centrality dependence of J/psi yields and observation of Z production in lead-lead collisions with the ATLAS detector at the LHC".PHYSICS LETTERS B 697.4(2011):294-312.
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