Measurement of the top quark pair production cross section in dilepton final states containing one τ lepton in pp collisions at s√ = 13 TeV
![Thumbnail](/xmlui/bitstream/handle/10679/7242/Measurement%20of%20the%20top%20quark%20pair%20production%20cross%20section%20in%20dilepton%20final%20states%20containing%20one%20%cf%84%20lepton%20in%20pp%20collisions%20at%20s%e2%88%9a%20%3d%2013%20TeV.pdf.jpg?sequence=4&isAllowed=y)
View/ Open
Type :
Article
Publication Status :
Published
Access :
openAccess
Abstract
The cross section of top quark pair production is measured in the t (t) over bar -> (lv(l))(tau(h)v(tau))b (b) over bar final state, where tau(h) refers to the hadronic decays of the tau 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 root s = 13TeV with the CMS detector. The measured cross section is sigma(t (t) over bar) = 781 +/- 7 (stat) +/- 62 (syst) +/- 20 (lumi) pb, and the ratio of the partial width Gamma(t -> tau v(tau)b) 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) over bar production cross section in proton-proton collisions at root s = 13TeV that explicitly includes t leptons. The ratio of the cross sections in the l tau(h) and ll final states yields a value R-l tau h/ll = 0.973 +/- 0.009 (stat) +/- 0.066 (syst), consistent with lepton universality.
Source :
Journal of High Energy Physics
Date :
2020-02-28
Issue :
2
Publisher :
Springer Nature
Collections
Share this page