Upsilon production cross section in pp collisions at root s=7 TeV

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	Upsilon production cross section in pp collisions at root s=7 TeV
	CMS Collaboration
刊名	PHYSICAL REVIEW D
	2011
卷号	83 期号:11
关键词	QED RADIATIVE-CORRECTIONS UNIVERSAL MONTE-CARLO QUARKONIUM PHOTOS
通讯作者	Khachatryan, V (reprint author), Yerevan Phys Inst, Yerevan 375036, Armenia.
英文摘要	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.
学科主题	Astronomy & Astrophysics; Physics
类目[WOS]	Astronomy & Astrophysics ; Physics, Particles & Fields
收录类别	SCI
语种	英语
WOS记录号	WOS:000291658800001
公开日期	2016-02-25
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/213062]
专题	高能物理研究所_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 GB/T 7714	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).