Non-perturbative Heavy Quark Effective Theory

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...

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Detalles Bibliográficos
Autores principales: Heitger, Jochen, Sommer, Rainer
Lenguaje:eng
Publicado: 2003
Materias:
Particle Physics - Lattice
Acceso en línea:https://dx.doi.org/10.1088/1126-6708/2004/02/022
http://cds.cern.ch/record/676337
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author Heitger, Jochen
Sommer, Rainer
author_facet Heitger, Jochen
Sommer, Rainer
author_sort Heitger, Jochen
collection CERN
description 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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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2003
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spelling cern-6763372023-03-14T20:28:06Zdoi:10.1088/1126-6708/2004/02/022http://cds.cern.ch/record/676337engHeitger, JochenSommer, RainerNon-perturbative Heavy Quark Effective TheoryParticle Physics - LatticeWe 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.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.hep-lat/0310035MS-TP-03-13DESY-03-156CERN-TH-2003-233SFB-CPP-03-45CERN-TH-2003-233DESY-03-156DESY-2003-156MS-TP-2003-13oai:cds.cern.ch:6763372003-10-13
spellingShingle Particle Physics - Lattice
Heitger, Jochen
Sommer, Rainer
Non-perturbative Heavy Quark Effective Theory
title Non-perturbative Heavy Quark Effective Theory
title_full Non-perturbative Heavy Quark Effective Theory
title_fullStr Non-perturbative Heavy Quark Effective Theory
title_full_unstemmed Non-perturbative Heavy Quark Effective Theory
title_short Non-perturbative Heavy Quark Effective Theory
title_sort non-perturbative heavy quark effective theory
topic Particle Physics - Lattice
url https://dx.doi.org/10.1088/1126-6708/2004/02/022
http://cds.cern.ch/record/676337
work_keys_str_mv AT heitgerjochen nonperturbativeheavyquarkeffectivetheory
AT sommerrainer nonperturbativeheavyquarkeffectivetheory

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