Exploratory study of the D_s spectrum in 2+1 Domain Wall QCD with heavy   overlap
  We present preliminary results for the D_s meson spectroscopy study on the 2+1 flavour domain wall fermion lattice configurations, generated with the Iwasaki gauge action at beta=2.13 by the RBC-UKQCD collaboration. The simulations are on 16^3\times32 lattice with L_s=16. We consider the charm quark propagating as an overlap fermion at fixed lattice spacing. The dispersion relation and mass splittings are evaluated. 
Chris Allton, Chris Maynard, Aurora Trivini, Robert Tweedie (RBC and   UKQCD Collaborations)