Semileptonic decays of baryons in a relativistic quark model
Helmholtz-Institut für Strahlen- und Kernphysik, Nußallee 14-16, 53115, Bonn, Germany
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Accepted: 21 April 2006
Published online: 12 May 2006
We calculate semileptonic decays of light and heavy baryons in a relativistically covariant constituent quark model. The model is based on the Bethe-Salpeter equation in instantaneous approximation. It generates satisfactory mass spectra for mesons and baryons up to the highest observable energies. Without introducing additional free parameters we compute on this basis helicity amplitudes of electronic and muonic semileptonic decays of baryons. We thus obtain form factor ratios and decay rates in good agreement with experiment.
PACS: 11.10.St Bound and unstable states; Bethe-Salpeter equations – / 12.39.Ki Relativistic quark model – / 13.30.Ce Leptonic, semileptonic, and radiative decays –
© Società Italiana di Fisica and Springer-Verlag, 2006