Measurement of the top quark pair production cross section in dilepton final states containing one tau lepton in pp collisions at root s=13 TeV

Sirunyan, A. M. and Tumasyan, A. R. and Adam, Wolfgang and Ambrogi, Federico and Bergauer, Thomas and Md. Ali, Mohd. Adli (2020) Measurement of the top quark pair production cross section in dilepton final states containing one tau lepton in pp collisions at root s=13 TeV. Journal of High Energy Physics, 2020 (2). pp. 1-40. E-ISSN 1029-8479

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Abstract

The cross section of top quark pair production is measured in the t¯t → (`ν` )(τhντ )bb final state, where ¯ τh refers to the hadronic decays of the τ lepton, and ` 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 σt¯t = 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 t¯t production cross section in proton-proton collisions at √ s = 13 TeV that explicitly includes τ leptons. The ratio of the cross sections in the `τh and `` final states yields a value R`τh/`` = 0.973 ± 0.009 (stat) ± 0.066 (syst), consistent with lepton universality

Item Type:	Article (Journal)
Additional Information:	7861/88856
Uncontrolled Keywords:	Hadron-Hadron scattering (experiments), Top physics
Subjects:	Q Science > QC Physics
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Science > Department of Physics
Depositing User:	Dr Mohd Adli MD Ali
Date Deposited:	12 Mar 2021 15:30
Last Modified:	12 Mar 2021 15:30
URI:	http://irep.iium.edu.my/id/eprint/88856

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