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Upsilon production cross section in pp collisions at root s=7 TeV
CMS Collaboration
2011
发表期刊PHYSICAL REVIEW D
卷号83期号:11
通讯作者Khachatryan, V (reprint author), Yerevan Phys Inst, Yerevan 375036, Armenia.
摘要The Y(1S), Y(2S), and Y(3S) production cross sections in proton-proton collisions at root s = 7 TeV are measured using a data sample collected with the CMS detector at the LHC, corresponding to an integrated luminosity of 3.1 +/- 0.3 pb(-1). Integrated over the rapidity range vertical bar y vertical bar < 2, we find the product of the Y(1S) production cross section and branching fraction to dimuons to be sigma(pp -> Y(1S)X) center dot B(Y(1S) -> mu(+)mu(-)) = 7.37 +/- 0.13(-0.42)(+0.61) +/- 0.81 nb, where the first uncertainty is statistical, the second is systematic, and the third is associated with the estimation of the integrated luminosity of the data sample. This cross section is obtained assuming unpolarized Y(1S) production. With the assumption of fully transverse or fully longitudinal production polarization, the measured cross section changes by about 20%. We also report the measurement of the Y(1S), Y(2S), and Y(3S) differential cross sections as a function of transverse momentum and rapidity.
关键词QED RADIATIVE-CORRECTIONS UNIVERSAL MONTE-CARLO QUARKONIUM PHOTOS
学科领域Astronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.83.112004
收录类别SCI
语种英语
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
WOS记录号WOS:000291658800001
引用统计
被引频次:62[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/311005/213062
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. Upsilon production cross section in pp collisions at root s=7 TeV[J]. PHYSICAL REVIEW D,2011,83(11).
APA CMS Collaboration.(2011).Upsilon production cross section in pp collisions at root s=7 TeV.PHYSICAL REVIEW D,83(11).
MLA CMS Collaboration."Upsilon production cross section in pp collisions at root s=7 TeV".PHYSICAL REVIEW D 83.11(2011).
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