Non-perturbative Heavy Quark Effective Theory

Details Non-perturbative Heavy Quark Effective Theory Non-perturbative Heavy Quark Effective Theory

2003-10-13

arxiv.org/abs/hep-lat/0310035v2

JHEP 0402:022,2004

Physics

High Energy Physics

High Energy Physics - Lattice

27 pages including figures and tables, latex2e; version published in JHEP, typos corrected and 1 reference added

Scientific paper

10.1088/1126-6708/2004/02/022

We explain how to perform non-perturbative computations in HQET on the lattice. In particular the problem of the subtraction of power-law divergences is solved by a non-perturbative matching of HQET and QCD. As examples, we present a full calculation of the mass of the b-quark in the combined static and quenched approximation and outline an alternative way to obtain the B-meson decay constant at lowest order. Since no excessively large lattices are required, our strategy can also be applied including dynamical fermions.

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