Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2001-12-20
Phys.Rev. D65 (2002) 094514
Physics
High Energy Physics
High Energy Physics - Lattice
35 pages, 17 figures. Program LatHQ2QCD to compute matching one-loop coefficients available at http://theory.fnal.gov/people/k
Scientific paper
10.1103/PhysRevD.65.094514
We apply heavy-quark effective theory (HQET) to separate long- and short-distance effects of heavy quarks in lattice gauge theory. In this paper we focus on flavor-changing currents that mediate transitions from one heavy flavor to another. We stress differences in the formalism for heavy-light currents, which are discussed in a companion paper, showing how HQET provides a systematic matching procedure. We obtain one-loop results for the matching factors of lattice currents, needed for heavy-quark phenomenology, such as the calculation of zero-recoil form factors for the semileptonic decays $B\to D^{(*)}l\nu$. Results for the Brodsky-Lepage-Mackenzie scale $q^*$ are also given.
Harada Junpei
Hashimoto Shoji
Kronfeld Andreas S.
Onogi Tetsuya
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