Cross section measurement of t-channel single top quark production in pp collisions at s=13TeV

The CMS collaboration

Результат исследования: Научные публикации в периодических изданияхстатьярецензирование

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Аннотация

The cross section for the production of single top quarks in the t channel is measured in proton–proton collisions at 13TeV with the CMS detector at the LHC. The analyzed data correspond to an integrated luminosity of 2.2fb−1. The event selection requires one muon and two jets where one of the jets is identified as originating from a bottom quark. Several kinematic variables are then combined into a multivariate discriminator to distinguish signal from background events. A fit to the distribution of the discriminating variable yields a total cross section of 238±13(stat)±29(syst) pb and a ratio of top quark and top antiquark production of Rt-ch.=1.81±0.18(stat)±0.15(syst). From the total cross section the absolute value of the CKM matrix element Vtb is calculated to be 1.05±0.07(exp)±0.02(theo). All results are in agreement with the standard model predictions.

Язык оригинала английский 752-776 25 Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 772 https://doi.org/10.1016/j.physletb.2017.07.047 Опубликовано - 10 сент. 2017

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