Weak Decays of Heavy Mesons in the Instantaneous Bethe Salpeter Approach

Details Weak Decays of Heavy Mesons in the Instantaneous Bethe Salpeter Approach Weak Decays of Heavy Mesons in the Instantaneous Bethe Salpeter Approach

1994-12-22

arxiv.org/abs/hep-ph/9412355v1

Z.Phys.C68:103-112,1995

Physics

High Energy Physics

High Energy Physics - Phenomenology

28p LATEX, 13 tables, 7 figures (*.eps style)

Scientific paper

10.1007/BF01579809

In the framework of the instantaneous Bethe Salpeter equation we investigate weak decays of B and D mesons. Mesons are described as q-bar q states interacting via a mixture of a scalar and a vector confining kernel and a one gluon exchange. The model parameters are fixed by a fit to the meson mass spectrum including also the light mesons. We calculate form factors and compare our results to the pole dominance hypothesis. From a fit to ARGUS and CLEO data on B -> D* semileptonic decay we extract the Cabbibo Kobayashi Maskawa matrix element to be V_cb= (0.032+-0.003)*sqrt(1.49ps/tau_B). The Isgur Wise function is calculated utilizing the heavy quark mass limit. Finally, we give some results on non-leptonic decays.

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