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QCD sum rules in the effective heavy quark theory

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Bagan, E. ; Ball, Patricia ; Braun, Vladimir M. ; Dosch, H. G.
Date of publication of this fulltext: 12 Apr 2010 12:22


We derive sum rules for the leptonic decay constant of a heavy-light meson in the effective heavy quark theory. We show that the summation of logarithms in the heavy quark mass by the renormalization group technique enhances considerably radiative corrections. Our result for the decay constant in the static limit agrees well with recent lattice calculations. Finite quark mass corrections are estimated.

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