We calculate radiative corrections to the light-cone sum rule for the semileptonic form factor in B →ev decays and thus remove the major uncertainty in determining the CKM mixing angle \Vub\ by this method. We discuss the remaining uncertainties and perspectives for further studies. The structure of the radiative corrections suggests factorization of soft (end-point) and hard rescattering contributions in heavy-to-light decays in the heavy quark limit. © 1998 Elsevier Science B.V.
|Journal||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|Publication status||Published - 15 Jan 1998|