Application of heavy-quark effective theory to lattice QCD. II. Radiative corrections to heavy-light currents

Junpei Harada, Shoji Hashimoto, Ken-Ichi Ishikawa, Andreas S. Kronfeld, Tetsuya Onogi, Norikazu Yamada
2002 Physical Review D, Particles and fields  
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
more » ... 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.
doi:10.1103/physrevd.65.094513 fatcat:mdz7mb35pvbiplupatumpma3s4