Upsilon (nS) polarizations versus particle multiplicity in pp collisions at root s=7 TeV
CMS Collaboration
刊名PHYSICS LETTERS B
2016
卷号761页码:31-52
关键词CMS Physics Quarkonium production Quarkonium polarization QCD medium effects
DOI10.1016/j.physletb.2016.07.065
文章类型Article
英文摘要The polarizations of the Upsilon(1S), Upsilon(2S), and Upsilon(3S) mesons are measured as a function of the charged particle multiplicity in proton-proton collisions at root s = 7 TeV. The measurements are performed with a dimuon data sample collected in 2011 by the CMS experiment, corresponding to an integrated luminosity of 4.9fb(-1). The results are extracted from the dimuon decay angular distributions, in two ranges of Upsilon(nS) transverse momentum (10-15 and 15-35 GeV), and in the rapidity interval |y| < 1.2. The results do not show significant changes from low-to high-multiplicity pp collisions, although large uncertainties preclude definite statements in the Upsilon(2S) and Upsilon(3S) cases. (C) 2016 The Author(s). Published by Elsevier B.V.
关键词[WOS]QUARKONIUM
语种英语
WOS记录号WOS:000384469900006
引用统计
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/260745
专题中国科学院高能物理研究所_粒子天体物理中心_期刊论文
作者单位中国科学院高能物理研究所
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CMS Collaboration. Upsilon (nS) polarizations versus particle multiplicity in pp collisions at root s=7 TeV[J]. PHYSICS LETTERS B,2016,761:31-52.
APA CMS Collaboration.(2016).Upsilon (nS) polarizations versus particle multiplicity in pp collisions at root s=7 TeV.PHYSICS LETTERS B,761,31-52.
MLA CMS Collaboration."Upsilon (nS) polarizations versus particle multiplicity in pp collisions at root s=7 TeV".PHYSICS LETTERS B 761(2016):31-52.
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