B => ππ\ell νdecays in a QCD relativistic potential model

Details B => ππ\ell νdecays in a QCD relativistic potential model B => ππ\ell νdecays in a QCD relativistic potential model

1999-09-23

arxiv.org/abs/hep-ph/9909492v1

Phys.Lett. B471 (1999) 81-88

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages LaTeX2e + 3 figures, Napoli Preprint DSF 99/32

Scientific paper

In the framework of a QCD relativistic potential model we evaluate the form factors describing the exclusive decay B => \pi\pi \ell \nu. The calculation is performed in a phase space region far away from the resonances and therefore is complementary to other decay mechanisms where the pions are produced by intermediate particles, e.g. in the chiral approach. We give an estimate of the contribution of the non resonant channel of the order of BR(B- => \pi+ \pi- \ell \nu) \approx 2.2 x 10^(-4).

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