Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.11851/4962
Title: Measurement of isolated-photon pair production in pp collisions at root s=7 TeV with the ATLAS detector
Authors: Aad, G.
Abajyan, T.
Abbott, B.
Abdallah, J.
Khalek, S. Abdel
Abdelalim, A. A.
The ATLAS Collaboration
Sultansoy, Saleh
Keywords: Hadron-Hadron Scattering
Issue Date: 2013
Publisher: Springer
Abstract: 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.
URI: https://doi.org/10.1007/JHEP01(2013)086
https://hdl.handle.net/20.500.11851/4962
ISSN: 1029-8479
Appears in Collections:Malzeme Bilimi ve Nanoteknoloji Mühendisliği Bölümü / Department of Material Science & Nanotechnology Engineering
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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