Measurement of inclusive and differential cross sections for single top quark production in association with a W boson in proton-proton collisions at √s = 13 TeV
Abstract
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 with the CMS detector at the LHC during 2016–2018, and correspond to an integrated luminosity of 138 fb⁻¹. Events containing one electron and one muon in the final state are analysed. For the inclusive measurement, a multivariate discriminant, exploiting the kinematic properties of the events is used to separate the signal from the dominant tt¯ background. A cross section of 79.2 ± 0.9(stat)⁺⁷.⁷₋₈.₀ (syst) ± 1.2(lumi) pb is obtained, consistent with the predictions of the standard model. For the differential measurements, a fiducial region is defined according to the detector acceptance, and the requirement of exactly one jet coming from the fragmentation of a bottom quark. The resulting distributions are unfolded to particle level and agree with the predictions at next-to-leading order in perturbative quantum chromodynamics. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000635470Publication status
publishedExternal links
Journal / series
Journal of High Energy PhysicsVolume
Pages / Article No.
Publisher
SpringerSubject
Hadron-Hadron Scattering; Top PhysicsOrganisational unit
03904 - Wallny, Rainer / Wallny, Rainer
03593 - Dissertori, Günther / Dissertori, Günther
09720 - de Cosa, Annapaola / de Cosa, Annapaola
Funding
758316 - Majorana neutrino discovery strategy with CMS (EC)
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