Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2001-12-20
Phys.Rev. D65 (2002) 094513; Erratum-ibid. D71 (2005) 019903
Physics
High Energy Physics
High Energy Physics - Lattice
32 pages, 8 figures. v2 corrects Eqs. (4.9) and (4.10) and adds a reference. Program LatHQ2QCD to compute matching one-loop co
Scientific paper
10.1103/PhysRevD.71.019903
We apply heavy-quark effective theory to separate long- and short-distance effects of heavy quarks in lattice gauge theory. In this approach, the inverse heavy-quark mass and the lattice spacing are treated as short distances, and their effects are lumped into short-distance coefficients. We show how to use this formalism to match lattice gauge theory to continuum QCD, order by order in the heavy-quark expansion. In this paper, we focus on heavy-light currents. In particular, we obtain one-loop results for the matching factors of lattice currents, needed for heavy-quark phenomenology, such as the calculation of heavy-light decay constants, and heavy-to-light transition form factors. Results for the Brodsky-Lepage-Mackenzie scale $q^*$ are also given.
Harada Junpei
Hashimoto Shoji
Ishikawa Ken-ichi
Kronfeld Andreas S.
Onogi Tetsuya
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