Measurement of the production cross section of three isolated photons in pp collisions at √s=8 TeV using the ATLAS detector

Allbrooke, B M M, Asquith, L, Cerri, A, Chavez Barajas, C A, De Santo, A, Salvatore, F, Santoyo Castillo, I, Suruliz, K, Sutton, M R, Vivarelli, I and The ATLAS Collaboration, (2018) Measurement of the production cross section of three isolated photons in pp collisions at √s=8 TeV using the ATLAS detector. Physics Letters B, 781. pp. 55-76. ISSN 0370-2693

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Abstract

A measurement of the production of three isolated photons in proton–proton collisions at a centre-of-mass energy √s=8TeV is reported. The results are based on an integrated luminosity of 20.2fb−1 collected with the ATLAS detector at the LHC. The differential cross sections are measured as functions of the transverse energy of each photon, the difference in azimuthal angle and in pseudorapidity between pairs of photons, the invariant mass of pairs of photons, and the invariant mass of the triphoton system. A measurement of the inclusive fiducial cross section is also reported. Next-to-leading-order perturbative QCD predictions are compared to the cross-section measurements. The predictions underestimate the measurement of the inclusive fiducial cross section and the differential measurements at low photon transverse energies and invariant masses. They provide adequate descriptions of the measurements at high values of the photon transverse energies, invariant mass of pairs of photons, and invariant mass of the triphoton system.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Research Centres and Groups: Experimental Particle Physics Research Group
Subjects: Q Science > QC Physics
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Depositing User: Billy Wichaidit
Date Deposited: 24 May 2018 13:06
Last Modified: 06 Jun 2018 13:36
URI: http://srodev.sussex.ac.uk/id/eprint/76094

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Project NameSussex Project NumberFunderFunder Ref
ATLASG0275STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCILST/I006048/1