Weak nonleptonic decays of vector B -mesons

Ivanov M.A. Tyulemissov Z. Tyulemissova A.
1 January 2023 American Physical Society

Physical Review D
2023 #107 Issue 1

We study the radiative and weak nonleptonic decays of vector B mesons within the covariant confined quark model developed in our previous papers. First, we calculate the matrix elements and decays widths of the radiative decays B∗→Bγ. The obtained results are compared with those obtained in other approaches. Then, we consider the nonleptonic decays B∗→D∗V which proceed via tree-level quark diagrams. We show that the analytical expressions for the amplitudes correspond to the factorization approach. In the framework of our model we calculate the leptonic decay constants and the form factors of the B∗→D∗(V) transitions in the entire physical region of the momentum transfer squared. Finally, we calculate the two-body decay widths and compare our results with other models.

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Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna, 141980, Russian Federation
The Institute of Nuclear Physics, Ministry of Energy of the Republic of Kazakhstan, Almaty, 050032, Kazakhstan
Al-Farabi Kazakh National University, Almaty, 050040, Kazakhstan

Bogoliubov Laboratory of Theoretical Physics
The Institute of Nuclear Physics
Al-Farabi Kazakh National University

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