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Constraining λBs by Bs → γ* and Bs → ϕ form factorsстатья Исследовательская статья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Ivanov Mikhail A., Melikhov Dmitri, Simula Silvano
- Журнал: Physical Review D
- Том: 110
- Номер: 9
- Год издания: 2024
- Издательство: American Physical Society
- Местоположение издательства: United States
- Первая страница: 1
- Последняя страница: 10
- Номер статьи: 094048
- DOI: 10.1103/PhysRevD.110.094048
- Аннотация: We calculate the form factors FV(q2,q'2) and FTV(q2,q'2) describing the Bs → γll transition induced by the vector and tensor weak currents in a broad range of values of q2 and q'2 far below the quark thresholds in both q2 and q'2 channels. These form factors are calculated via the distribution amplitudes of the Bs-meson. We then interpolate the obtained results by a formula that contains pole at q'2=Mϕ2 and extract the residue which gives the Bs → ϕ transition form factors V(q2) and T(q2). In this way we obtain theoretical predictions for these form factors without invoking quark-hadron duality and QCD sum rules. Furthermore, we calculate the relationship between V(0) and T(0) and the parameter λBs(μ), the inverse moment of the Bs-meson distribution amplitude. Using the available predictions for V(0) and T(0) coming from approaches not referring to the Bs-meson distribution amplitudes, we obtain the estimate λBs(μ ≃ mb)=(0.62\pm 0.10) GeV.
- Добавил в систему: Мелихов Дмитрий Игоревич