Measurement of the production cross section for single top quarks in association with W bosons in proton-proton collisions at √s=13 TeV

A bstract A measurement is presented of the associated production of a single top quark and a W boson in proton-proton collisions at √s=13 s = 13 TeV by the CMS Collaboration at the CERN LHC. The data collected corresponds to an integrated luminosity of 35.9 fb −1 . The measurement is performed using events with one electron and one muon in the final state along with at least one jet originated from a bottom quark. A multivariate discriminant, exploiting the kinematic properties of the events, is used to separate the signal from the dominant tt̄ t t ¯ background. The measured cross section of 63 . 1 ± 1 . 8(stat) ± 6 . 4(syst) ± 2 . 1 (lumi) pb is in agreement with the standard model expectation.