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Measurement of isolated-photon pair production in pp collisions at root s=7 TeV with the ATLAS detector
ATLAS collaboration
2013
发表期刊JOURNAL OF HIGH ENERGY PHYSICS
期号1
通讯作者Aad, G (reprint author), Univ Freiburg, Fak Math & Phys, Hugstetter Str 55, D-79106 Freiburg, Germany.
摘要The ATLAS experiment at the LHC has measured the production cross section of events with two isolated photons in the final state, in proton-proton collisions at root s = 7 TeV. The full data set collected in 2011, corresponding to an integrated luminosity of 4.9 fb(-1), is used. The amount of background, from hadronic jets and isolated electrons, is estimated with data-driven techniques and subtracted. The total cross section, for two isolated photons with transverse energies above 25 GeV and 22 GeV respectively, in the acceptance of the electromagnetic calorimeter (vertical bar eta vertical bar < 1.37 and 1.52 < vertical bar eta vertical bar 2.37) and with an angular separation Delta R > 0.4, is 44.0(-4.2)(+3.2) pb. The differential cross sections as a function of the di-photon invariant mass, transverse momentum, azimuthal separation, and cosine of the polar angle of the largest transverse energy photon in the Collins-Soper di-photon rest frame are also measured. The results are compared to the prediction of leading-order parton-shower and next-to-leading-order and next-to-next-to-leading-order parton-level generators.
关键词PARTON DISTRIBUTIONS BOSON LHC HIERARCHY MASS
学科领域Physics
DOI10.1007/JHEP01(2013)086
收录类别SCI
语种英语
WOS类目Physics, Particles & Fields
WOS记录号WOS:000315583600005
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/311005/213476
专题实验物理中心
作者单位中国科学院高能物理研究所
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ATLAS collaboration. Measurement of isolated-photon pair production in pp collisions at root s=7 TeV with the ATLAS detector[J]. JOURNAL OF HIGH ENERGY PHYSICS,2013(1).
APA ATLAS collaboration.(2013).Measurement of isolated-photon pair production in pp collisions at root s=7 TeV with the ATLAS detector.JOURNAL OF HIGH ENERGY PHYSICS(1).
MLA ATLAS collaboration."Measurement of isolated-photon pair production in pp collisions at root s=7 TeV with the ATLAS detector".JOURNAL OF HIGH ENERGY PHYSICS .1(2013).
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