Measurement of isolated-photon pair production in pp collisions at root s=7 TeV with the ATLAS detector
文献类型：期刊论文
| 作者 | ATLAS collaboration |
| 刊名 | JOURNAL OF HIGH ENERGY PHYSICS
 |
| 出版日期 | 2013 |
| 期号 | 1 |
| 关键词 | PARTON DISTRIBUTIONS BOSON LHC HIERARCHY MASS |
| 通讯作者 | Aad, G (reprint author), Univ Freiburg, Fak Math & Phys, Hugstetter Str 55, D-79106 Freiburg, Germany. |
| 英文摘要 | 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. |
| 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:000315583600005 |
| 公开日期 | 2016-02-26 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/213476]  |
| 专题 | 高能物理研究所_实验物理中心 |
| 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 | 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). |
入库方式： OAI收割
来源：高能物理研究所
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