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
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...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English English English |
| Published: |
Springer Nature
2020
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/88856/1/88856_Measurement%20of%20the%20single%20top%20quark%20and%20antiquark_article.pdf http://irep.iium.edu.my/88856/2/88856_Measurement%20of%20the%20single%20top%20quark%20and%20antiquark_scopus.pdf http://irep.iium.edu.my/88856/3/88856_Measurement%20of%20the%20single%20top%20quark%20and%20antiquark_wos.pdf http://irep.iium.edu.my/88856/ https://link.springer.com/content/pdf/10.1007/JHEP02(2020)191.pdf |
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| Summary: | 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 |
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