Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2010-04-22
JHEP 1008:074,2010
Physics
High Energy Physics
High Energy Physics - Lattice
31 pages including figures and tables, latex2e, uses JHEP3.cls; revised version published in JHEP, clarifying remarks and refe
Scientific paper
10.1007/JHEP08(2010)074
We non-perturbatively determine the renormalization constant and the improvement coefficients relating the renormalized current and subtracted quark mass in O(a) improved two-flavour lattice QCD. We employ the Schr\"odinger functional scheme and fix the physical extent of the box by working at a constant value of the renormalized coupling. Our calculation yields results which cover two regions of bare parameter space. One is the weak-coupling region suitable for volumes of about half a fermi. By making simulations in this region, quarks as heavy as the bottom can be propagated with the full relativistic QCD action and renormalization problems in HQET can be solved non-perturbatively by a matching to QCD in finite volume. The other region refers to the common parameter range in large-volume simulations of two-flavour lattice QCD, where our results have particular relevance for charm physics applications.
Fritzsch Patrick
Heitger Jochen
Tantalo Nazario
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