Observation of tW production in the single-lepton channel in pp collisions at √s = 13 TeV
Journal
Journal of High Energy Physics
Journal Volume
2021
Journal Issue
11
Date Issued
2021
Author(s)
Abstract
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 tt ¯ 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 muon or electron and jets, with a significance exceeding 5 standard deviations. The cross section is determined to be 89 ± 4 (stat) ± 12 (syst) pb, consistent with the standard model. [Figure not available: see fulltext.] ? 2021, The Author(s).
Subjects
Hadron-Hadron scattering (experiments); Top physics;
Type
journal article