Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2007-10-05
PoSLAT2007:246,2007
Physics
High Energy Physics
High Energy Physics - Lattice
14 pages including figures and tables, latex2e, uses PoS.cls; presented at the XXV International Symposium on Lattice Field Th
Scientific paper
We explain how the strategy of solving renormalization problems in HQET non-perturbatively by a matching to QCD in finite volume can be implemented to include dynamical fermions. As a primary application, some elements of an HQET computation of the mass of the b-quark beyond the leading order with N_f=2 are outlined. In particular, the matching of HQET and QCD requires relativistic QCD simulations in a volume with L ~ 0.5 fm, which will serve to quantitatively determine the heavy quark mass dependence of heavy-light meson observables in the continuum limit of finite-volume two-flavour lattice QCD. As a preparation for the latter, we report on our determination of the renormalization constants and improvement coefficients relating the renormalized current and subtracted bare quark mass in the relevant weak coupling region. The calculation of these coefficients employs a constant physics condition in the Schroedinger functional scheme, where the box size L is fixed by working at a prescribed value of the renormalized coupling.
Fritzsch Patrick
Heitger Jochen
Meyer Harvey B.
Morte Michele Della
Simma Hubert
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