Two-loop QCD corrections to semileptonic b-quark decays near maximum recoil
A. Pak, I. Blokland, A. Czarnecki
Abstract
Two-gluon radiative corrections to the b cν decay width have been computed analytically as an expansion in terms of mcmb << 1 in the kinematical limit of zero lepton invariant mass. The obtained results match smoothly with a previously known expansion around (1 - mcmb << 1. Together they describe the process b cν for all mass ratios mcmb.
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