Measurement of the inclusive $\mathrm{t}\bar{\mathrm{t}}$ cross section in pp collisions at $\sqrt{s}=$ 5.02 TeV using final states with at least one charged lepton

The top quark pair production cross section (${\sigma }_{\mathrm{t}\bar{\mathrm{t}}}$) is measured for the first time in pp collisions at a center-of-mass energy of 5.02 TeV. The data were collected by the CMS experiment at the LHC and correspond to an integrated luminosity of 27.4 pb${}^{-1}$. The measurement is performed by analyzing events with at least one charged lepton. The measured cross section is ${\sigma }_{\mathrm{t}\bar{\mathrm{t}}}=69.5\pm 6.1$ (stat) $\pm 5.6$ (syst) $\pm 1.6$ (lumi) pb, with a total relative uncertainty of 12%. The result is in agreement with the expectation from the standard model. The impact of the presented measurement on the determination of the gluon distribution function is investigated.