Kinetic operator effects in B-> X_c l nu at O(alpha_s)
  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. 
Andrea Alberti, Thorsten Ewerth, Paolo Gambino, Soumitra Nandi
hep-ph