Decay constants, semi-leptonic and non-leptonic decays in a Bethe-Salpeter Model

Details Decay constants, semi-leptonic and non-leptonic decays in a Bethe-Salpeter Model Decay constants, semi-leptonic and non-leptonic decays in a Bethe-Salpeter Model

1997-11-14

arxiv.org/abs/hep-ph/9711338v1

Phys.Rev. D58 (1998) 014007

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 Pages, 3 Postscript figures (available also from alaa@iastate.edu)

Scientific paper

10.1103/PhysRevD.58.014007

We evaluate the decay constants for the B and $D$ mesons and the form factors for the semileptonic decays of the B meson to $D$ and $D^*$ mesons in a Bethe-Salpeter model. From data we extract $V_{cb}=0.039 \pm 0.002$ from ${\bar B} \to D^* l {\bar{\nu}} $ and $V_{cb}=0.037 \pm 0.004$ from ${\bar B} \to D l {\bar{\nu}} $ decays. The form factors are then used to obtain non-leptonic decay partial widths for $ B\to D \pi (K) $ and $B \to D D (D_s) $ in the factorization approximation.

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