One leading source of uncertainty in the lattice computation of semi-leptonic form factors in B decay, and to a lesser extent B meson decay constants, comes from the extrapolation of the light quark mass to the physical up/down mass. This talk presents first explorations of simulating the light quark with staggered fermion actions, which are free of the spurious zero modes that effect Wilson-like Dirac operators and are less costly. Methods for fitting to Euclidean-time NRQCD-staggered meson propagators are discussed, and some preliminary spectrum results are presented.
@article{arxiv.hep-lat/0110161,
title = {Heavy-light physics using NRQCD-staggered actions},
author = {Matthew Wingate and Junko Shigemitsu and G. Peter Lepage},
journal= {arXiv preprint arXiv:hep-lat/0110161},
year = {2007}
}