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Measurement of the mass difference and relative production rate of the \ensuremathØmegab- and \ensuremathΞb- baryonsстатья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Бережной А.В., Горелов И.В., Данилина А.В., Козачук А.Д., Лефлат А.К., Никитин Н.В., Саврина Д.В., Соломин А.Н., Волков В.Ю., Жуков В.Ю., Королев М.Г., LHCb Collaboration
- Журнал: Physical Review D
- Том: 108
- Номер: 5
- Год издания: 2023
- Издательство: American Physical Society
- Местоположение издательства: United States
- Первая страница: 052008
- DOI: 10.1103/PhysRevD.108.052008
- Аннотация: The mass difference between the Ωb- and Ξb- baryons is measured using proton-proton collision data collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb-1, and is found to be m(Ωb-)-m(Ξb-)=248.54±0.51(stat)±0.38(syst) MeV/c2. The mass of the Ωb- baryon is measured to be m(Ωb-)=6045.9±0.5(stat)±0.6(syst) MeV/c2. This is the most precise determination of the Ωb- mass to date. In addition, the production rate of Ωb- baryons relative to that of Ξb- baryons is measured for the first time in pp collisions, using an LHCb dataset collected at a center-of-mass energy of 13 TeV and corresponding to an integrated luminosity of 6 fb-1. Reconstructing beauty baryons in the kinematic region 2<η<6 and pT<20 GeV/c with their decays to a J/ψ meson and a hyperon, the ratio fΩb-fΞb-×B(Ωb-→J/ψΩ-)B(Ξb-→J/ψΞ-)=0.120±0.008(stat)±0.008(syst), is obtained, where fΩb- and fΞb- are the fragmentation fractions of b quarks into Ωb- and Ξb- baryons, respectively, and B represents the branching fractions of their respective decays.
- Добавил в систему: Бережной Александр Викторович