Amplitude analysis of the Łambdac+→pK-\ensuremathπ+ decay and Łambdac+ baryon polarization measurement in semileptonic beauty hadron decays

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: 1
Год издания: 2023
Издательство: American Physical Society
Местоположение издательства: United States
Первая страница: 012023
DOI: 10.1103/PhysRevD.108.012023
Аннотация: An amplitude analysis of Λ+c→pK−π+ decays together with a measurement of the Λ+c polarization vector in semileptonic beauty hadron decays is presented. A sample of 400000 candidates is selected from proton-proton collisions recorded by the LHCb detector at a center-of-mass energy of 13 TeV. An amplitude model is developed and the resonance fractions as well as two- and three-body decay parameters are reported. The mass and width of the Λ(2000) state are also determined. A significant Λ+c polarization is found. A large sensitivity of the Λ+c→pK−π+ decay to the polarization is seen, making the amplitude model suitable for Λ+c polarization measurements in other systems.
Добавил в систему: Бережной Александр Викторович

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