BLM-Resummation and OPE in Heavy Flavor Transitions
Nikolai Uraltsev
Abstract
An all-order resummation is performed for the effect of the running of the strong coupling in the zero recoil sum rule for the axial current and for the kinetic operator π2. The perturbative corrections to well-defined objects of OPE turn out to be very moderate. The renormalization of the kinetic operator is addressed.
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