Please use this identifier to cite or link to this item: https://hdl.handle.net/2440/129111
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Type: Journal article
Title: Measurements of inclusive and differential cross-sections of combined tt¯ γ and tWγ production in the eμ channel at 13 TeV with the ATLAS detector
Other Titles: Measurements of inclusive and differential cross-sections of combined tt -bar gamma and tWgamma production in the e mu channel at 13 TeV with the ATLAS detector
Author: Aad, G.
Abbott, B.
Abbott, D.C.
Abed Abud, A.
Abeling, K.
Abhayasinghe, D.K.
Abidi, S.H.
AbouZeid, O.S.
Abraham, N.L.
Abramowicz, H.
Abreu, H.
Abulaiti, Y.
Acharya, B.S.
Achkar, B.
Adam, L.
Adam Bourdarios, C.
Adamczyk, L.
Adamek, L.
Adelman, J.
Adersberger, M.
et al.
Citation: The Journal of High Energy Physics, 2020; 2020(9):1-48
Publisher: Springer
Issue Date: 2020
ISSN: 1029-8479
1029-8479
Statement of
Responsibility: 
G. Aad, B. Abbott, D.C. Abbott, A. Abed Abud, K. Abeling, D.K. Abhayasinghe ... et al. (The ATLAS collaboration)
Abstract: Inclusive and di erential cross-sections for the production of top quarks in association with a photon are measured with proton-proton collision data corresponding to an integrated luminosity of 139 fb􀀀1. The data were collected by the ATLAS detector at the LHC during Run 2 between 2015 and 2018 at a centre-of-mass energy of 13TeV. The measurements are performed in a ducial volume de ned at parton level. Events with exactly one photon, one electron and one muon of opposite sign, and at least two jets, of which at least one is b-tagged, are selected. The ducial cross-section is measured to be 39:6 +2:7 􀀀2:3 fb. Di erential cross-sections as functions of several observables are compared with state-ofthe- art Monte Carlo simulations and next-to-leading-order theoretical calculations. These include cross-sections as functions of photon kinematic variables, angular variables related to the photon and the leptons, and angular separations between the two leptons in the event. All measurements are in agreement with the predictions from the Standard Model.
Keywords: Hadron-Hadron scattering (experiments); top physics
Rights: This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.
DOI: 10.1007/JHEP09(2020)049
Published version: http://dx.doi.org/10.1007/JHEP09(2020)049
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