Nonperturbative Corrections to the Heavy Lepton Energy Distribution in the Inclusive Decays $H_b\text{ra}\tau \bar{\nu }X.$

Abstract

Nonperturbative corrections up to $m_b^{-2}$ 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 $b\text{ra}u\tau \text{bnu}$ transitions they decrease the decay rate by 6\% of its perturbative value, while for $b\text{ra}c\tau \text{bnu}$ they decrease it by 10\%.

Comments: LaTeX, 10 pages, 4 postscript figures included. Few typos corrected