Three-loop anomalous dimension of the heavy-light quark current in HQET

Physics – High Energy Physics – High Energy Physics - Phenomenology

Scientific paper

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16 pages, 7 eps figures. Typos in the discussion of fB/fD corrected. Paper is also available at http://www-ttp.physik.uni-karl

Scientific paper

10.1016/S0550-3213(03)00490-5

The anomalous dimension of the heavy-light quark current in HQET is
calculated with three-loop accuracy, as well as the renormalized heavy-quark
propagator. The NNL perturbative correction to f_B/f_D is obtained.

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