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arxiv: hep-lat/0310035 · v2 · pith:VOBIJXYLnew · submitted 2003-10-13 · ✦ hep-lat · hep-ph

Non-perturbative Heavy Quark Effective Theory

classification ✦ hep-lat hep-ph
keywords non-perturbativehqetalternativeappliedapproximationb-mesonb-quarkcalculation
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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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