QCD predictions for lepton spectra in inclusive heavy flavor decays

I. I. Bigi, M. Shifman, N. G. Uraltsev, A. Vainshtein

Research output: Contribution to journalArticlepeer-review

494 Scopus citations


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/mQ2 terms affecting mainly the end-point region; they are different for meson and baryon decays as well as for bottom and charm decays.

Original languageEnglish (US)
Pages (from-to)496-499
Number of pages4
JournalPhysical review letters
Issue number4
StatePublished - 1993


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