Non-perturbative heavy quark effective theory

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Published 3 March 2004 • Published under licence by IOP Publishing Ltd
, , Citation Jochen Heitger and Rainer Sommer JHEP02(2004)022 DOI 10.1088/1126-6708/2004/02/022

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Author affiliations

1 Westfälische Wilhelms-Universität Münster, Institut für Theoretische Physik, Wilhelm-Klemm-Strasse 9, D-48149 Münster, Germany

2 Deutsches Elektronen-Synchrotron DESY, Zeuthen, Platanenallee 6, D-15738 Zeuthen, Germany

3 CERN, Theory Division, CH-1211 Geneva 23, Switzerland

Dates

  1. Received 15 December 2003
  2. Accepted 9 February 2004
  3. Published

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1126-6708/2004/02/022

Abstract

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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10.1088/1126-6708/2004/02/022