出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：Following the strategy developed by the ALPHA collaboration, we present a method to compute
non-perturbatively the decay constant of a heavy-light meson in HQET including the 1/m
corrections. We start by a matching between HQET and QCD in a small volume to determine
the parameters of the effective theory non-perturbatively. Observables in the effective theory are
then evolved to larger volumes. In two steps a large enough volume is reached to determine the
physical decay constant. Some preliminary results in the quenched approximation are shown.
