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

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	Albertus, Conrado; Flynn, Jonathan M.; Hernández Gajate, Eliecer; Nieves Pamplona, Juan Miguel; Verde Velasco, José María
	This document is a artículoDate2007
	Este documento está disponible también en : http://hdl.handle.net/10550/39286
	The semileptonic decay B ->pi is studied starting from a simple quark model that takes into 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 accessible in the physical decay. By comparison to the experimental data, we extract \| V (ub)\| = (3.4 +/- 0.2(exp.)+/- 0.7(theory))10(-3). 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.
	Albertus, Conrado Flynn, Jonathan M. Hernández Gajate, Eliecer Nieves Pamplona, Juan Miguel Verde Velasco, José María 2007 Study of the semileptonic decays B ->pi, D ->pi and D -> K European Physical Journal A 31 4 725 727
	http://dx.doi.org/10.1140/epja/i2006-10247-9