Nonperturbative corrections to the heavy lepton energy distribution in the inclusive decaysHb→τν¯X

Abstract

Nonperturbative corrections up to ${\mathit{m}}_{\mathit{b}}^{\mathrm{-}2}$ to the heavy lepton energy distributions are investigated in the inclusive semileptonic weak decays of heavy flavors in QCD. In the case of B-meson decays, for b→uτν¯ transitions they decrease the decay rate by 6% of its perturbative value, while for b→cτν¯ they decrease it by 10%.