Observation of tW production in the single-lepton channel in pp collisions at $\sqrt{s}$ = 13 TeV Vrije Universiteit Brussel
Freya Blekman, Emil Sørensen Bols, Jorgen D'Hondt, Jarne Theo De Clercq, M. Delcourt, H. El Faham, Steven Lowette, Seth Moortgat, Alexander Morton, D. Müller, A. R. Sahasransu, S. Tavernier, Walter Van Doninck, Petra Van Mulders, N. Stylianou
A measurement of the cross section of the associated production of a single top quark and a W boson in final states with a muon or electron and jets in proton-proton collisions at √ s = 13 TeV is presented. The data correspond to an integrated luminosity of 36 fb−1 collected with the CMS detector at the CERN LHC in 2016. A boosted decision tree is used to separate the tW signal from the dominant t¯t background, whilst the subleading W+jets and multijet backgrounds are constrained using data-based estimates. This result is the first observation of the tW process in final states containing a ...