The European Physical Journal A

, Volume 31, Issue 4, pp 725–727 | Cite as

Study of the semileptonic decays B→π, D→π and D→K

  • C. Albertus
  • J. M. Flynn
  • E. Hernández
  • J. Nieves
  • J. M. Verde-Velasco
QNP 2006

Abstract.

The semileptonic decay Bπ 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 Dπ and DK decays for which we get good agreement with experiment.

PACS.

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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Copyright information

© Società Italiana di Fisica and Springer-Verlag 2007

Authors and Affiliations

  • C. Albertus
    • 1
  • J. M. Flynn
    • 1
  • E. Hernández
    • 2
  • J. Nieves
    • 3
  • J. M. Verde-Velasco
    • 2
  1. 1.School of Physics and AstronomyUniversity of SouthamptonSouthamptonUK
  2. 2.Grupo de Fısica Nuclear, Departamento de Fısica Fundamental e IUFFyMFacultad de CienciasSalamancaSpain
  3. 3.Departamento de Fısica Atómica, Molecular y NuclearUniversidad de GranadaGranadaSpain

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