Abstract
Semileptonic heavheavy and heavlight meson transitions are studied as a phenomenological application of a heavy-quark limit of Dyson-Schwinger equations. Employing two parameters, , the difference between the mass of the heavy meson and the effective mass of the heavy quark, and , the width of the heavy-meson Bethe-Salpeter amplitude, we calculate for all decays on their entire kinematically accessible domain. Our study favors in the range – GeV and with GeV and fm we obtain . As a result of neglecting corrections, we estimate that our calculated values of and are too low by approximately 15%. However, the bulk of these corrections should cancel in our calculated values of Br and .
- Received 12 November 1997
DOI:https://doi.org/10.1103/PhysRevC.57.1991
©1998 American Physical Society