Cross section measurement of t-channel single top quark production in pp collisions at sqrt(s) = 13 TeV

Abstract : The cross section for the production of single top quarks in the t channel is measured in proton-proton collisions at 13 TeV with the CMS detector at the LHC. The analyzed data correspond to an integrated luminosity of 2.3 inverse-femtobarns. The event selection requires one muon and two jets where one of the jets is identified as originating from a bottom quark. Several kinematic variables are then combined into a multivariate discriminator to distinguish signal from background events. A fit to the distribution of the discriminating variable yields a total cross section of 232 +/- 13 (stat) +/- 28 (syst) pb and a ratio of top quark and top antiquark production of R[t-ch.] = $ 1.81 +/- 0.18 (stat) +/- 0.15 (syst). From the total cross section the absolute value of the CKM matrix element V[tb] is calculated to be 1.03 +/- 0.07 (exp) +/- 0.02 (theo). All results are in agreement with the standard model predictions.
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Submitted on : Tuesday, October 4, 2016 - 10:23:11 AM
Last modification on : Wednesday, July 17, 2019 - 9:06:16 AM

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A.M. Sirunyan, M. Besançon, F. Couderc, M. Dejardin, D. Denegri, et al.. Cross section measurement of t-channel single top quark production in pp collisions at sqrt(s) = 13 TeV. Physics Letters B, Elsevier, 2017, 72, pp.752. ⟨10.1016/j.physletb.2017.07.047⟩. ⟨in2p3-01376035⟩

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