Measurement of the total and diferential cross-sections of ttW¯ production in pp collisions at √s = 13 TeV with the ATLAS detector
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(Published version)
Date
2024
Authors
Aad, G.
Abbott, B.
Abeling, K.
Abicht, N.J.
Abidi, S.H.
Aboulhorma, A.
Abramowicz, H.
Abreu, H.
Abulaiti, Y.
Abusleme Hoffman, A.C.
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Journal article
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The Journal of High Energy Physics, 2024; 2024(5):131-1-131-75
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The ATLAS collaboration
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Abstract
Measurements of inclusive and differential production cross-sections of a topquark-top-antiquark pair in association with a W boson (ttW¯ ) are presented. They are performed by targeting fnal states with two same-sign or three isolated leptons (electrons or muons) and are based on √ s = 13 TeV proton-proton collision data with an integrated luminosity of 140 fb−1 , recorded from 2015 to 2018 with the ATLAS detector at the Large Hadron Collider. The inclusive ttW¯ production cross-section is measured to be 880 ± 80 fb, compared to a reference theoretical prediction of 745 ± 50 (scale) ± 13 (2-loop approx.) ± 19 (PDF, αs)fb. Differential cross-section measurements characterise this process in detail for the first time. Several particle-level observables are compared with a variety of theoretical predictions, which generally agree well with the normalised diferential cross-section results. Additionally, the relative charge asymmetry of ttW¯ + and ttW¯ − is measured inclusively to be Arel C = 0.33 ± 0.05, in very good agreement with the theoretical prediction of 0.322 ± 0.003 (scale) ± 0.007 (PDF), as well as differentially.
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Copyright CERN, for the beneft of the ATLAS Collaboration. Article funded by SCOAP3 . Open Access . 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.