Inclusive and differential measurement of the single top quark cross-section in association with a W boson in the $e\mu$ channel with CMS

Measurements of the inclusive and normalised differential cross sections are presented for the production of single top quarks in association with a W boson in proton-proton collisions at a centre-of-mass energy of 13 TeV. The data used were recorded during 2016--2018 with the CMS detector at the LHC, and correspond to an integrated luminosity of $138 \ \mathrm{fb}^{-1}$. Events containing one electron and one muon in the final state are analysed.