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.
@article{arxiv.hep-ph/9412228,
title = {Quenched Chiral Corrections to Heavy-Light Decay Constants at Order 1/M},
author = {Michael J. Booth},
journal= {arXiv preprint arXiv:hep-ph/9412228},
year = {2008}
}
Comments
14 pages, Latex, 6 postscript figures (included separately). Complete ps available at http://www.phys.ufl.edu/~booth/papers/quenched2.ps.gz . Minor changes to text in revised version