CP asymmetry in flavour-specific B decays beyond leading logarithms
M. Beneke, G. Buchalla, A. Lenz, U. Nierste
Abstract
We compute next-to-leading order QCD corrections to the CP asymmetry afs = Im(Gamma12/M12) in flavour-specific Bd,s decays such as Bd->X l nu or Bs->D-s pi+. The corrections reduce the uncertainties associated with the choice of the renormalization scheme for the quark masses significantly. In the Standard Model we predict adfs = -(5.0 +- 1.1)*10-4. As a by-product we also obtain the width difference in the Bd system at next-to-leading order in QCD.
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