Quenched Chiral Corrections to Heavy-Light Decay Constants at Order 1/M

الأصل · EN

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.