Study of the semileptonic decays B→<Emphasis Type="Italic">π</Emphasis>, D→<Emphasis Type="Italic">π</Emphasis> and D→K |
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| Authors: | C Albertus J M Flynn E Hernández J Nieves J M Verde-Velasco |
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| Institution: | (1) School of Physics and Astronomy, University of Southampton, SO17 1BJ Southampton, UK;(2) Grupo de Fısica Nuclear, Departamento de Fısica Fundamental e IUFFyM, Facultad de Ciencias, E-37008 Salamanca, Spain;(3) Departamento de Fısica Atómica, Molecular y Nuclear, Universidad de Granada, E-18071 Granada, Spain |
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| Abstract: | The semileptonic decay B→π is studied starting from a simple quark model that takes into 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 q2 values accessible in the physical decay. By comparison to the experimental data, we extract | V
ub| = (3.4±0.2(exp.)±0.7(theory))0-3. As a further test of the model, we have also studied D→π and D→K decays for which we get good agreement with experiment. |
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| Keywords: | 12 15 Hh Determination of Kobayashi-Maskawa matrix elements 11 55 Fv Dispersion relations 12 39 Jh Nonrelativistic quark model 13 20 He Decays of bottom mesons |
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