Perturbative corrections to power suppressed effects in B → Xulν

We compute the O(alpha (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.

Automated summary

This study computes the O(alpha (s)) corrections to the Wilson coefficients of dimension five operators in inclusive semileptonic B decays in the limit of a massless final quark. The results are consistent with reparametrization invariance and previous findings on total width, while also enhancing the constraints on shape functions in these decays.