Measurement of the total and differential cross-sections of ttW production in pp collisions at √s = 13 TeV with the ATLAS detector Aad, Georges Rodríguez Chala, Mikael Atlas Collaboration, / Hadron-Hadron Scattering Top Physics Measurements of inclusive and differential production cross-sections of a top-quark-top-antiquark pair in association with a W boson (ttW) 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 = 13TeV 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 differential cross-section results. Additionally, the relative charge asymmetry of ttW+ and ttW− is measured inclusively to be ArelC = 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. 2024-09-02T11:50:48Z 2024-09-02T11:50:48Z 2024-05-10 journal article The ATLAS collaboration., Aad, G., Abbott, B. et al. Measurement of the total and differential cross-sections of ttW production in pp collisions at √s = 13 TeV with the ATLAS detector. J. High Energ. Phys. 2024, 131 (2024). https://doi.org/10.1007/JHEP05(2024)131 https://hdl.handle.net/10481/93793 10.1007/JHEP05(2024)131 eng http://creativecommons.org/licenses/by/4.0/ open access Atribución 4.0 Internacional Springer Nature