Heavy light mesons at a larger lattice spacing

We want to detail our new and as yet preliminary simulation results on the spectrum and the renormalised decay constant of heavy light mesons. They were obtained on coarser lattices compared to previous analyses, see [1] for a review. This allows us to study scaling violations. A second motivation is the possibility of reaching the charm region with NRQCD for D mesons, which have a different power counting than J/ψ. For the simulations we use 278 quenched 12× 24 configurations at β = 5.7 generously provided by the UKQCD-Collaboration. To simulate the light quarks on the lattice we use the tadpole improved clover action with κc = 0.1434 from [2] and κs|K = 0.1398 from [3]. The Hamiltonian of the heavy quarks is expanded around its non relativistic limit with tadpole improved gauge links and fields: