Relativistic description of weak decays of Bs mesons

Abstract

The branching fractions of the semileptonic and rare B s decays are calculated in the framework of the QCD-motivated relativistic quark model. The form factors of the weak B s transitions are expressed through the overlap integrals of the initial and final meson wave functions in the whole accessible kinematical range. The momentum transfer dependence of the form factors is explicitly determined without additional model assumptions and extrapolations. The obtained results agree well with available experimental data.

Phenomenology of GeV-scale heavy neutral leptons

“…Best fit values of parameters are adopted from papers [113][114][115]. f , σ parameters are given in Table 13, while ξ and the pole masses M V and M P are given in Table 14.…”

“…f , σ parameters are given in Table 13, while ξ and the pole masses M V and M P are given in Table 14. [113][114][115]. Masses of B c , D s and D * s are taken from [66], while for B * c theoretical prediction [116] is used.…”

“…First part of the table with parameters of meson form factors (C.28-C.30) of decay into vector meson[113][114][115].…”

Production of GeV-scale heavy neutral leptons in three-body decays. Comparison with the PYTHIA approach

“…Form-factors f (q 2 ), g(q 2 ), a ± (q 2 ) can be found from the dimensionless linear combinations [64][65][66]:…”

“…The best fit values of parameters are given in papers [64][65][66]. The parameters f and σ are given in table 3.…”