An investigation into the Fermilab approach to heavy quarks on the lattice

Abstract

We use a space-time asymmetric O(a) improved fermion action and fix the asymmetry non-perturbatively to restore the relativistic dispersion relation. We compute spectra and matrix elements of quarkonia and heavy-light mesons and compare with results obtained using a symmetric action with the Fermilab interpretation i.e. that the physics of heavy lattice quarks depends solely on their kinetic mass. We provide additional evidence to support this.

Comments: 3pp LaTeX2e using ijmpa1.sty (included), 6 PostScript figures. Contribution to proceedings of DPF2000 (section 18, Non-perturbative quantum field theory) Columbus, OH, Aug. 2000