The static quark potential in 2+1 flavour Domain Wall QCD from QCDOC
  We report our present status of on-going project on the measurement of the static quark potential in 2+1 flavour domain wall QCD with various improved gauge actions and couplings. Lattice spacing determined from Sommer scale on these ensembles are from 1.6 GeV to 2.0 GeV for $16^3 \times 32$ lattice with fifth dimension size 8. We also examine size of discretization error from scaling of a pair of dimensionless quantities, $(r_0 m_\pi)^2$ and $r_0 m_\rho$, and found small scaling violation. 
Koichi Hashimoto, Taku Izubuchi, Jun Noaki (for the RBC-UKQCD   Collaborations)