Prompt and non-prompt J/psi production in pp collisions at root s=7 TeV

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	Prompt and non-prompt J/psi production in pp collisions at root s=7 TeV
	CMS Collaboration
刊名	EUROPEAN PHYSICAL JOURNAL C
	2011
卷号	71 期号:3
关键词	OCTET QUARKONIA PRODUCTION QED RADIATIVE-CORRECTIONS UNIVERSAL MONTE-CARLO PSI-PRODUCTION HADROPRODUCTION COLLIDERS FLAVORS GLUONS PHOTOS
通讯作者	Khachatryan, V (reprint author), Yerevan Phys Inst, Yerevan 375036, Armenia.
英文摘要	The production of J/psi mesons is studied in pp collisions at root s = 7 TeV with the CMS experiment at the LHC. The measurement is based on a dimuon sample corresponding to an integrated luminosity of 314 nb(-1). The J/psi differential cross section is determined, as a function of the J/psi transverse momentum, in three rapidity ranges. A fit to the decay length distribution is used to separate the prompt from the non-prompt (b hadron to J/psi) component. Integrated over J/psi transverse momentum from 6.5 to 30 GeV/c and over rapidity in the range vertical bar y vertical bar < 2.4, the measured cross sections, times the dimuon decay branching fraction, are 70.9 +/- 2.1(stat.) +/- 3.0(syst.) +/- 7.8(luminosity) nb for prompt J/psi mesons assuming unpolarized production and 26.0 +/- 1.4(stat.) +/- 1.6(syst.) +/- 2.9(luminosity) nb for J/psi mesons from b-hadron decays.
学科主题	Physics
类目[WOS]	Physics, Particles & Fields
收录类别	SCI
语种	英语
WOS记录号	WOS:000291698400002
公开日期	2016-02-25
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/213064]
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. Prompt and non-prompt J/psi production in pp collisions at root s=7 TeV[J]. EUROPEAN PHYSICAL JOURNAL C,2011,71(3).
APA	CMS Collaboration.(2011).Prompt and non-prompt J/psi production in pp collisions at root s=7 TeV.EUROPEAN PHYSICAL JOURNAL C,71(3).
MLA	CMS Collaboration."Prompt and non-prompt J/psi production in pp collisions at root s=7 TeV".EUROPEAN PHYSICAL JOURNAL C 71.3(2011).