Weak Decays Of Heavy Mesons In A Covariant Quark Model

Details Weak Decays Of Heavy Mesons In A Covariant Quark Model Weak Decays Of Heavy Mesons In A Covariant Quark Model

2001-04-03

arxiv.org/abs/hep-ph/0104029v2

Eur.Phys.J.A13:477-491,2002

Physics

High Energy Physics

High Energy Physics - Phenomenology

20 pages including 13 tables and 6 figures; Corrected typos

Scientific paper

10.1007/s10050-002-8778-1

In this paper we investigate weak decays of heavy mesons in the framework of a covariant quark model, which is based on the Bethe-Salpeter equation in instantaneous approximation. Apart from a phenomenological confinement potential, a residual interaction induced by instantons is adopted. Masses and many decay observables of light mesons have already been described successfully in this model. An appropiate extension allows a unified description of light and heavy systems. Using a set of parameters which are fixed by the mass spectra, we evaluate the form factors of semileptonic decays of charmed and bottom mesons. In the heavy quark limit these can be reduced to the Isgur-Wise function, which is calculated. Finally the form factors are used to determine the non-leptonic decay rates of B mesons in the factorization approximation.

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