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Weak decays of heavy mesons in a covariant quark model

  • D. Merten
  • R. Ricken
  • M. Koll
  • B. Metsch
  • H.R. Petry

Abstract:

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 (Eur. Phys. J. A 9, 73 (2000); 221). An appropriate 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.

PACS. 12.39.Ki Covariant quark model – 13.20.Fc Heavy mesons – 13.20.He Semileptonic decays 

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Copyright information

© Società Italiana di Fisica and Springer-Verlag 2002

Authors and Affiliations

  • D. Merten
    • 1
  • R. Ricken
    • 1
  • M. Koll
    • 1
  • B. Metsch
    • 1
  • H.R. Petry
    • 1
  1. 1.Institut für Theoretische Kernphysik, Nußallee 14-16, D-53115 Bonn, GermanyDE

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