Measurement of CP asymmetry in B0s→D∓sK± decays

Авторы: Бережной А.В., Горелов И.В., Лефлат А.К., Никитин Н.В., Саврина Д.В., Волков В.Ю., Жуков В.Ю., LHCb Collaboration
Журнал: Journal of High Energy Physics
Том: 2018
Номер: 3
Год издания: 2018
Издательство: IOP Publishing
Местоположение издательства: [Bristol, UK], England
DOI: 10.1007/jhep03(2018)059
Аннотация: We report the measurements of the CP -violating parameters in B0s → D∓s K± decays observed in pp collisions, using a data set corresponding to an integrated luminosity of 3.0 fb−1 recorded with the LHCb detector. We measure Cf = 0.73 ± 0.14 ± 0.05, AΔΓf = 0.39 ± 0.28 ± 0.15, AΔΓf¯¯¯=0.31±0.28±0.15 , Sf = −0.52 ± 0.20 ± 0.07, Sf¯¯¯=−0.49±0.20±0.07 , where the uncertainties are statistical and systematic, respectively. These parameters are used together with the world-average value of the B0s mixing phase, −2βs , to obtain a measurement of the CKM angle γ from B0s → D∓s K± decays, yielding γ = (128+ 17− 22 )° modulo 180°, where the uncertainty contains both statistical and systematic contributions. This corresponds to 3.8 σ evidence for CP violation in the interference between decay and decay after mixing.
Добавил в систему: Бережной Александр Викторович

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