We derive the lepton spectrum in semileptonic b decays from a nonperturbative treatment of QCD; it is based on an expansion in 1/mQ with mQ being the heavy flavor quark mass. The leading corrections arising on the 1/mQ level are completely expressed in terms of the difference in the mass of the heavy hadron and the quark. Nontrivial effects appear in 1/m2Q terms affecting mainly the end-point region; they are different for meson and baryon decays as well as for bottom and charm decays.
Physical Review Letters
- Pub Date:
- July 1993
- Decays of other mesons;
- Other nonperturbative calculations;
- High Energy Physics - Phenomenology
- 6 pages (3 figures are not included), Latex, UND-HEP-93-BIG01, TPI-MINN-93/12-T, UMN-TH-1149/93