Quark model study of the semileptonic B -> pi decay
C. Albertus, J. M. Flynn, E. Hernandez, J. Nieves, J. M. Verde--Velasco
Abstract
The semileptonic decay B->pi is studied starting from a simple quark model and taking into account the effect of the B* resonance. A novel, multiply subtracted, Omnès dispersion relation has been implemented to extend the predictions of the quark model to all physical q2 values. We find |Vub|=0.0034 +/- 0.0003(exp.)+/- 0.0007(theory), in good agreement with experiment.
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