Perturbative corrections to power suppressed effects in B ¯ $$ \overline{B} $$ → X u ℓν

Abstract

Abstract We compute the O(α s ) corrections to the Wilson coefficients of the dimension five operators in inclusive semileptonic B decays in the limit of a massless final quark. Our calculation agrees with reparametrization invariance and with previous results for the total width and improves the constraints on the shape functions that enter those decays.

Keywords

• Heavy Quark Physics
• Perturbative QCD
• Quark Masses and SM Parameters