Measurement of differential cross sections for the production of a pair of isolated photons in pp collisions at root s=7TeV

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	Measurement of differential cross sections for the production of a pair of isolated photons in pp collisions at root s=7TeV
	CMS Collaboration
刊名	EUROPEAN PHYSICAL JOURNAL C
	2014
卷号	74 期号:11
关键词	LHC HIERARCHY BOSON MASS
通讯作者	Chatrchyan, S (reprint author), Yerevan Phys Inst, Yerevan 375036, Armenia.
英文摘要	A measurement of differential cross sections for the production of a pair of isolated photons in proton-proton collisions at root s = 7 TeV is presented. The data sample corresponds to an integrated luminosity of 5.0 fb(-1) collected with the CMS detector. A data-driven isolation template method is used to extract the prompt diphoton yield. The measured cross section for two isolated photons, with transverse energy above 40 and 25 GeV respectively, in the pseudorapidity range vertical bar eta vertical bar < 2.5, vertical bar eta vertical bar (sic) [1.44, 1.57] and with an angular separation Delta R > 0.45, is 17.2 +/-0.2 (stat) +/-1.9 (syst) +/- 0.4 (lumi) pb. Differential cross sections are measured as a function of the diphoton invariant mass, the diphoton transverse momentum, the azimuthal angle difference between the two photons, and the cosine of the polar angle in the Collins-Soper reference frame of the diphoton system. The results are compared to theoretical predictions at leading, next-to-leading, and next-to-next-to-leading order in quantum chromodynamics.
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:000347170900001
公开日期	2016-02-25
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/213840]
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. Measurement of differential cross sections for the production of a pair of isolated photons in pp collisions at root s=7TeV[J]. EUROPEAN PHYSICAL JOURNAL C,2014,74(11).
APA	CMS Collaboration.(2014).Measurement of differential cross sections for the production of a pair of isolated photons in pp collisions at root s=7TeV.EUROPEAN PHYSICAL JOURNAL C,74(11).
MLA	CMS Collaboration."Measurement of differential cross sections for the production of a pair of isolated photons in pp collisions at root s=7TeV".EUROPEAN PHYSICAL JOURNAL C 74.11(2014).