CMS-PAS-TOP-23-008

CMS-PAS-TOP-23-008
Measurement of inclusive and differential cross sections for single top quark production in association with a W boson in proton-proton collisions at $ \sqrt{s}= $ 13.6 TeV
CMS Collaboration
27 March 2024

Abstract: The first measurement of the inclusive and normalised differential cross sections for the production of single top quarks in association with a W boson in proton-proton collisions at a centre-of-mass energy of 13.6 TeV are presented. The data used were recorded with the CMS detector at the LHC during 2022, and correspond to an integrated luminosity of 34.7 fb$^{-1}$. The analyzed events contain one muon and one electron in the final state. For the inclusive measurement, multivariate discriminants are used exploiting the kinematic properties of the events to separate the signal from the dominant top quark antiquark production background. A cross section of 84.1 $ \pm $ 2.1 (stat) $^{+9.8}_{-10.2}$ (syst) $\pm$ 3.3 (lumi) pb is obtained, consistent with the predictions of the standard model. A fiducial region is defined according to the detector acceptance for performing the differential measurements. The resulting differential distributions are unfolded to particle level and show good agreement with the predictions at next-to-leading order in perturbative quantum chromodynamics.
Links: CDS record (PDF) ; Physics Briefing ; CADI line (restricted) ; These preliminary results are superseded in this paper, Submitted to JHEP. The superseded preliminary plots can be found here.

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