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Measurement of the Lambda(b) cross section and the (Lambda)over-bar(b) to Lambda(b) ratio with J/psi Lambda decays in pp collisions at root s=7 TeV CMS Collaboration
CMS Collaboration
2012
发表期刊PHYSICS LETTERS B
卷号714期号:2--5页码:136-157
通讯作者Sphicas, P (reprint author), CERN, European Org Nucl Res, CH-1211 Geneva, Switzerland.
摘要The Lambda b differential production cross section and the cross section ratio sigma((Lambda) over bar (b))/sigma(Lambda(b)) are measured as functions of transverse momentum p(T)(Lambda b) rapidity vertical bar y(Lambda b)vertical bar in pp collisions at root s = 7 TeV using data collected by the CMS experiment at the LHC. The measurements are based on Lambda(b) decays reconstructed in the exclusive final state J/psi Lambda, with the subsequent decays J/psi -> mu(+)mu(-) and Lambda -> p pi, using a data sample corresponding to an integrated luminosity of 1.9 fb(-1). The product sigma(Lambda(b)) x B(Lambda(b) -> J/psi Lambda) versus p(T)(Lambda b) falls faster than that of b mesons. The measured value of sigma(Lambda(b)) x B(Lambda(b) -> J/psi Lambda) for p(T)(Lambda b) > 10 GeV and vertical bar y(Lambda b)vertical bar < 2.0 is 1.16 +/- 0.06 +/- 0.12 nb, and the integrated sigma(<(Lambda)over bar>(b))/sigma(Lambda(b)) ratio is 1.02 +/- 0.07 +/- 0.09, where the uncertainties are statistical and systematic, respectively. (C) 2012 CERN. Published by Elsevier B.V. All rights reserved.
关键词P(P)OVER-BAR COLLISIONS QUARK PRODUCTION LIFETIME DETECTOR
学科领域Physics
DOI10.1016/j.physletb.2012.05.063
收录类别SCI
语种英语
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000307680100003
引用统计
被引频次:32[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/311005/213314
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
推荐引用方式
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CMS Collaboration. Measurement of the Lambda(b) cross section and the (Lambda)over-bar(b) to Lambda(b) ratio with J/psi Lambda decays in pp collisions at root s=7 TeV CMS Collaboration[J]. PHYSICS LETTERS B,2012,714(2--5):136-157.
APA CMS Collaboration.(2012).Measurement of the Lambda(b) cross section and the (Lambda)over-bar(b) to Lambda(b) ratio with J/psi Lambda decays in pp collisions at root s=7 TeV CMS Collaboration.PHYSICS LETTERS B,714(2--5),136-157.
MLA CMS Collaboration."Measurement of the Lambda(b) cross section and the (Lambda)over-bar(b) to Lambda(b) ratio with J/psi Lambda decays in pp collisions at root s=7 TeV CMS Collaboration".PHYSICS LETTERS B 714.2--5(2012):136-157.
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