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Measurement of the prompt J/psi and psi(2S) polarizations in pp collisions at root s=7 TeV
CMS Collaboration
2013
发表期刊PHYSICS LETTERS B
卷号727期号:4--5页码:381-402
通讯作者Chatrchyan, S (reprint author), Yerevan Phys Inst, Yerevan 375036, Armenia.
摘要The polarizations of prompt J/psi and psi(2S) mesons are measured in proton-proton collisions at root s = 7 TeV, using a dimuon data sample collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 4.9 fb(-1). The prompt J/psi and psi(2S) polarization parameters lambda, lambda, and lambda, as well as the frame-invariant quantity (lambda) over bar. are measured from the dimuon decay angular distributions in three different polarization frames. The J/psi results are obtained in the transverse momentum range 14 < P-T < 70 GeV, in the rapidity intervals |y| < 0.6 and 0.6 < |y| < 1.2. The corresponding psi(2S) results cover 14 < PT < 50 GeV and include a third rapidity bin, 1.2 < |y| < 1.5. No evidence of large polarizations is seen in these kinematic regions, which extend much beyond those previously explored. (C) 2013 CERN. Published by Elsevier B.V. All rights reserved.
关键词HEAVY-QUARKONIUM
学科领域Physics
DOI10.1016/j.physletb.2013.10.055
收录类别SCI
语种英语
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000328722500006
引用统计
被引频次:75[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/311005/213645
专题粒子天体物理中心
作者单位中国科学院高能物理研究所
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CMS Collaboration. Measurement of the prompt J/psi and psi(2S) polarizations in pp collisions at root s=7 TeV[J]. PHYSICS LETTERS B,2013,727(4--5):381-402.
APA CMS Collaboration.(2013).Measurement of the prompt J/psi and psi(2S) polarizations in pp collisions at root s=7 TeV.PHYSICS LETTERS B,727(4--5),381-402.
MLA CMS Collaboration."Measurement of the prompt J/psi and psi(2S) polarizations in pp collisions at root s=7 TeV".PHYSICS LETTERS B 727.4--5(2013):381-402.
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