Heavy-light mesons with domain wall fermions

We present RBC heavy-light meson spectroscopy with quenched DBW2 gauge configurations at lattice cutoff a−1 of about 3 GeV. Both heavy and light quarks are described by domain-wall fermions (DWF). The heavy quark mass ranges between 0.1 and 0.4 lattice units, covering charm. The light quark mass ranges between 0.008 and 0.04, covering strange. In particular, we discuss charmed (D and D) and charm-strange (Ds and DsJ) mesons with spin-parity JP = 0 and 1. The preliminary results indicate that DWF describe charm on the quenched DBW2 ensemble at this cutoff. The masses of the JP = 0 and 1 D, D, Ds and DsJ meson states are well reproduced to within a few %; their parity splitting, ∆J , are better reproduced than previous works, with only 10-20 % over estimations; the experimental observation that the splitting for non-strange states, ∆ud , is bigger than that for strange states, ∆s, is reproduced as well; but the hyperfine splittings are only 60-65 % reproduced. Regarding the depenence on heavy quark mass, ∆J=0 and ∆J=1 are degenerate for mheavya > 0.2-0.3; ∆J=0 increases as mheavy decreases further while ∆J=1 does not.