$|V_{ub}|$ from exclusive $B$ and $D$ decays

Details $|V_{ub}|$ from exclusive $B$ and $D$ decays $|V_{ub}|$ from exclusive $B$ and $D$ decays

1995-12-04

arxiv.org/abs/hep-ph/9512225v1

Phys.Rev. D53 (1996) 4937-4945

Physics

High Energy Physics

High Energy Physics - Phenomenology

20 pages revtex, 6 figures included using epsf

Scientific paper

10.1103/PhysRevD.53.4937

We propose a model-independent method to determine the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element $|V_{ub}|$ from exclusive $B$ and $D$ decays. Combining information obtainable from $B\to \rho\ell\bar\nu_\ell$, $B\to K^*\nu\bar\nu$, $D\to \rho\bar\ell\nu_\ell$ and $D\to K^*\bar\ell\nu_\ell$, a determination of $|V_{ub}|$ is possible, with an uncertainty from theory of around 10\%. Theoretical uncertainties in the $B\to K^*\ell\bar\ell$ decay rate are discussed.

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