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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
2014
发表期刊EUROPEAN PHYSICAL JOURNAL C
卷号74期号:11
通讯作者Chatrchyan, S (reprint author), Yerevan Phys Inst, Yerevan 375036, Armenia.
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.
关键词LHC HIERARCHY BOSON MASS
学科领域Physics
DOI10.1140/epjc/s10052-014-3129-3
收录类别SCI
语种英语
WOS类目Physics, Particles & Fields
WOS记录号WOS:000347170900001
引用统计
被引频次:21[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/311005/213840
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. 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).
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