Quenched Chiral Corrections to Heavy-Light Decay Constants at Order 1/M
Abstract
Quenched chiral perturbation is used to study the decay constants for heavy-light mesons beyond the leading order in 1/M. The results are used to estimate the error in quenched lattice calculations of the decay constants. For the double ratio R1 = ( fDs/fD) / (fBs/fB) we find that the error is small, conservatively 6%, but likely smaller. We also find that quenching decreases the ratio fDs/fD relative to the unquenched theory.
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