Measurement of the Wt Production Cross Section in Dilepton Events with the ATLAS Detector

Single top quark production, accounting for $\sim\!1/3$ of the overall top quark production at the LHC, constitutes an excellent probe of the $W\text{-}t\text{-}b$ coupling, which is sensitive to certain types of new physics. One important production mode in the Standard Model is the creation of a single top quark in association with a $W$ boson. The close similarity of its final state to that of top quark pair production, which has a more than $10$ times larger production cross-section, makes the measurement a challenging endeavour. Hence multivariate techniques are appropriate to identify the $W\kern-0.12emt$ signal. The results of the latest $W\kern-0.12emt$ cross-section measurement with the ATLAS detector, based on $20\,\mathrm{fb}^{-1}$ of $p\kern-0.05emp$-collision data at $\sqrt{s\,}\!=\!8\,\mathrm{T\kern-0.05eme\kern-0.10emV}$, are presented.