Speaker
Description
A measurement of the top quark pole mass in events where the top quark-antiquark pair is produced in association with one additional jet is presented. This analysis is performed using proton-proton collision data at 13 TeV collected by the CMS experiment at the CERN LHC in 2016, corresponding to a total integrated luminosity of 36.3 fb${-1}$. Events with two opposite charge leptons in the final state (ee, $\mu\mu$, e$\mu$) are analyzed. Using multivariate analysis techniques based on Machine Learning, the reconstruction of the main observable and the event selection are optimized. The production cross section is measured as a function of the invariant of the $\text{t}\overline{\text{t}}$+jet system invariant mass at parton-level, using a maximum likelihood unfolding method. The top quark pole mass is then obtained from a chi-squared fit of the theory predictions at next-to-leading order precision to the data.
