Study of the semileptonic decays B->pi, D->pi and D->K

Details Study of the semileptonic decays B->pi, D->pi and D->K Study of the semileptonic decays B->pi, D->pi and D->K

2006-10-05

arxiv.org/abs/hep-ph/0610062v1

Eur.Phys.J.A31:725-727,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

3 pages, 5 figures. Talk given at the IV International Conference on Quarks and Nuclear Physics (QNP06), Madrid, June 5th - 10

Scientific paper

10.1140/epja/i2006-10247-9

The semileptonic decay B->pi is studied starting from a simple quark model that takes into account the effect of the B* resonance. A novel, multiply subtracted, Omnes dispersion relation has been implemented to extend the predictions of the quark model to all q^2 values accesible in the physical decay. By comparison to the experimental data, we extract |V_ub|=0.0034 +/- 0.0003(exp.) +/- 0.0007(theory). As a further test of the model, we have also studied D->pi and D->K decays for which we get good agreement with experiment.

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