Kinetic operator effects in B-> X_c l nu at O(alpha_s)

Abstract

We compute the O(alpha_s) corrections to the Wilson coefficient of the kinetic operator in inclusive semileptonic B decays. Our analytic calculation agrees with reparameterization invariance and with previous numerical results and paves the way to the calculation of analogous corrections to other power-suppressed coefficients.

Comments: 16 pages, v2: typos in eqs. 5.1 and A.5 fixed, results unchanged