Measurement of the total and differential cross-sections of t t ¯ W production in pp collisions at s = 13 TeV with the ATLAS detector

UNSPECIFIED (2024) Measurement of the total and differential cross-sections of t t ¯ W production in pp collisions at s = 13 TeV with the ATLAS detector. Journal of High Energy Physics, 2024 (5): 131. ISSN 1029-8479

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Abstract

Measurements of inclusive and differential production cross-sections of a top-quark-top-antiquark pair in association with a W boson (tt¯W) are presented. They are performed by targeting final 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 tt¯W 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 differential cross-section results. Additionally, the relative charge asymmetry of tt¯W+ and tt¯W− is measured inclusively to be ACrel = 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.

Item Type:
Journal Article
Journal or Publication Title:
Journal of High Energy Physics
Subjects:
?? hadron-hadron scatteringtop physics ??
ID Code:
220363
Deposited By:
Deposited On:
22 May 2024 11:00
Refereed?:
Yes
Published?:
Published
Last Modified:
23 May 2024 01:25