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Measurement of the top quark pair production cross section in dilepton final states containing one τ lepton in pp collisions at s√ = 13 TeV
CMS Collaboration
CMS Collaboration
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Abstract
The cross section of top quark pair production is measured in the tt¯→(ℓνℓ)(τhντ)bb¯¯¯ final state, where τh refers to the hadronic decays of the τ lepton, and ℓ is either an electron or a muon. The data sample corresponds to an integrated luminosity of 35.9 fb−1 collected in proton-proton collisions at s√ = 13 TeV with the CMS detector. The measured cross section is σtt¯ = 781 ± 7 (stat) ± 62 (syst) ± 20 (lumi) pb, and the ratio of the partial width Γ(t → τντb) to the total decay width of the top quark is measured to be 0.1050 ± 0.0009 (stat) ± 0.0071 (syst). This is the first measurement of the tt¯ production cross section in proton-proton collisions at s√ = 13 TeV that explicitly includes τ leptons. The ratio of the cross sections in the ℓτh and ℓℓ final states yields a value Rℓτh/ll = 0.973 ± 0.009 (stat) ± 0.066 (syst), consistent with lepton universality.
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2020-02-28
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Springer
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JHEP02(2020)191.pdf
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Hadron-Hadron scattering (experiments), Top physics
Citation
The CMS collaboration., Sirunyan, A.M., Tumasyan, A. et al. Measurement of the top quark pair production cross section in dilepton final states containing one τ lepton in pp collisions at s√ = 13 TeV. J. High Energ. Phys. 2020, 191 (2020). https://doi.org/10.1007/JHEP02(2020)191