Measurement of the t-tbar production cross section using events with one lepton and at least one jet in pp collisions at √ s = 13 TeVстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 25 апреля 2017 г.
Аннотация: A measurement of the tt¯tt¯ production cross section at √s = 13 TeV is presented using 2.3 fb−1−1 of proton-proton collision data acquired by the CMS detector. Final states including one isolated charged lepton (electron or muon) and at least one jet are selected and categorized according to the multiplicity of jets. From a likelihood fit to the invariant mass of the isolated lepton and a jet identified as stemming from the fragmentation and hadronization of b quark, the cross section is measured to be σ(tt¯)=σ(tt¯)= 834.6 ±± 2.5 (stat) ±± 22.8 (syst) ±± 22.5 (lumi) pb in agreement with the standard model prediction. Using the expected dependency of the cross section on the top quark pole mass at NNLO+NNLL we determine the latter to be mt=mt= 172.3+2.7−2.3−2.3+2.7 GeV.