Non-perturbative Heavy Quark Effective Theory | Zendy

Jochen Heitger | Zendy; Rainer Sommer | Zendy

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Non-perturbative Heavy Quark Effective Theory

Author(s) -

Jochen Heitger,

Rainer Sommer

Publication year - 2004

Publication title -

journal of high energy physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.998

H-Index - 261

eISSN - 1126-6708

pISSN - 1029-8479

DOI - 10.1088/1126-6708/2004/02/022

Subject(s) - physics , non perturbative , perturbation theory (quantum mechanics) , quark , computation , lattice qcd , particle physics , meson , fermion , lattice (music) , subtraction , quenched approximation , quantum chromodynamics , matching (statistics) , heavy quark effective theory , perturbative qcd , quantum electrodynamics , mathematics , algorithm , arithmetic , acoustics , statistics

We explain how to perform non-perturbative computations in HQET on thelattice. In particular the problem of the subtraction of power-law divergencesis solved by a non-perturbative matching of HQET and QCD. As examples, wepresent a full calculation of the mass of the b-quark in the combined staticand quenched approximation and outline an alternative way to obtain the B-mesondecay constant at lowest order. Since no excessively large lattices arerequired, our strategy can also be applied including dynamical fermions.Comment: 27 pages including figures and tables, latex2e; version published in JHEP, typos corrected and 1 reference adde

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