Abstract
We derive the lepton spectrum in semileptonic b decays from a nonperturbative treatment of QCD; it is based on an expansion in 1/ with being the heavy flavor quark mass. The leading corrections arising on the 1/ level are completely expressed in terms of the difference in the mass of the heavy hadron and the quark. Nontrivial effects appear in 1/ terms affecting mainly the end-point region; they are different for meson and baryon decays as well as for bottom and charm decays.
- Received 5 April 1993
DOI:https://doi.org/10.1103/PhysRevLett.71.496
©1993 American Physical Society