Fiducial cross-section measurements of top-quark pair production in association with a photon at √(s) = 13 TeV with the ATLAS detector

2019/01/13 by Joshua Wyatt Smith, Smith, Joshua Wyatt
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #hep-ex

paper · pdf · doi:10.48550/arxiv.1901.03929

International Workshop on Top Quark Physics, Bad Neuenahr, Germany, September 16-21, 2018

arxiv created 2019/01/13 · arxiv updated 2019/01/15

Abstract

Top-quark pairs in association with final state particles are produced in large quantities at the LHC due to the high centre-of-mass energy available in proton-proton collisions. One such topology is that of a prompt photon radiated from the top quark in addition to the final state particles from the top quark decay. Using 36.1 fb^-1 of data collected at √(s) = 13 TeV with the ATLAS detector, fiducial cross-section results are shown in the single-lepton and dilepton channels. Object-level and event-level neural networks are used to increase sensitivity.

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