Orateur
Description
The production of a top–antitop quark pair in association with a W boson (${t\bar{t}}W$) is a dominant background in several measurements of rare processes, such as $t\bar{t}H$ and four-top ($t\bar{t}t\bar{t}$) production, as well as in searches for physics beyond the Standard Model. The precision, accuracy, and modeling of the ${t\bar{t}}W$ process represent a major limitation in the sensitivity of these analyses. Moreover, previous LHC results have shown tensions between data and Standard Model predictions, further motivating precise studies of ${t\bar{t}}W$ production. This talk presents the latest measurements of both the inclusive and, for the first time, differential cross sections of the ${t\bar{t}}W$ process, using the full Run 2 dataset of proton–proton collisions at $\sqrt{s}$ = 13 TeV recorded with the ATLAS detector at the LHC.
