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arXiv · 1212.3167

Weak decays of $B_s$ mesons to $D_s$ mesons in the relativistic quark model

R. N. Faustov·V. O. Galkin
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Abstract

The form factors of weak decays of $B_s$ mesons to ground state $D_s^{(*)}$ mesons as well as to their radial $D_s^{(*)}(2S)$ and orbital $D_{sJ}^{(*)}$ excitations are calculated in the framework of the relativistic quark model based on the quasipotential approach. All relativistic effects, including contributions of intermediate negative-energy states and boosts of the meson wave functions, are consistently taken into account. As a result the form factors are determined in the whole kinematical range without additional phenomenological parametrizations and extrapolations. On this basis semileptonic decay branching fractions are calculated. Two-body nonleptonic $B_s$ decays are considered within the factorization approximation. The obtained results agree well with available experimental data.

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R. N. Faustov, V. O. Galkin. 2013-02-11. Weak decays of $B_s$ mesons to $D_s$ mesons in the relativistic quark model. https://doi.org/10.1103/physrevd.87.034033

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