Semileptonic B(yields)D(sup (*))l(nu) decays, the slope of Isgur-Wise function and (V(sub bc)) value in potential quark model

摘要

A modification of the naive model of the heavy meson is considered on the basis of the single-time prescription of the quark-meson form factor and the covariant choice of the quark relative momentum. The application of the model to the description of the semileptonic decays of the beauty allows one to determine the Isgur-Wise function slope p(sup 2)=1.25 and to extract the value (V(sub bc))=0.038+-0.003 from the experimental data. 19 refs. (Atomindex citation 26:078166)