@misc{10481/95822,
year = {2017},
month = {11},
url = {https://hdl.handle.net/10481/95822},
abstract = {The cross section of a top-quark pair produced in association with a photon is measured in proton-proton collisions at a centre-of-mass energy of √s = 8 TeV with 20.2 fb-1 of data collected by the ATLAS detector at the Large Hadron Collider in 2012. The measurement is performed by selecting events that contain a photon with transverse momentum pT > 15 GeV, an isolated lepton with large transverse momentum, large missing transverse momentum, and at least four jets, where at least one is identified as originating from a b-quark. The production cross section is measured in a fiducial region close to the selection requirements. It is found to be 139 ± 7 (stat.) ± 17 (syst.) fb, in good agreement with the theoretical prediction at next-to-leading order of 151 ± 24 fb. In addition, differential cross sections in the fiducial region are measured as a function of the transverse momentum and pseudorapidity of the photon.},
organization = {CERN},
organization = {MINECO},
organization = {EPLANET},
organization = {ERC},
organization = {ERDF},
organization = {FP7},
organization = {Horizon 2020},
organization = {Marie Skłodowska-Curie Actions},
organization = {CERCA Programme Generalitat de Catalunya},
organization = {Generalitat Valenciana},
publisher = {Springer Nature},
keywords = {Hadron-Hadron scattering (experiments)},
keywords = {Top physics},
title = {Measurement of the ttγ production cross section in proton-proton collisions at √s = 8 TeV with the ATLAS detector},
doi = {10.1007/JHEP11(2017)086},
author = {Aaboud, M. and Aguilar Saavedra, Juan Antonio and Atlas Collaboration, /},
}