Leptonic and Semileptonic Decays of Pseudoscalar Mesons

Abstract

We employ the relativistic constituent quark model to give a unified description of the leptonic and semileptonic decays of pseudoscalar mesons (\pi, K, D, D_s, B, B_s). The calculated leptonic decay constants and form factors are found to be in good agreement with available experimental data and other approaches. We reproduce the results of spin-flavor symmetry in the heavy quark limit.

Comments: 12 pages LaTeX (elsart.sty) + 4 figures; added references, to appear in Phys. Lett. B