A determination of the strange quark mass for unquenched clover fermions   using the AWI
  Using the O(a) Symanzik improved action an estimate is given for the strange quark mass for unquenched (nf=2) QCD. The determination is via the axial Ward identity (AWI) and includes a non-perturbative evaluation of the renormalisation constant. Numerical results have been obtained at several lattice spacings, enabling the continuum limit to be taken. Results indicate a value for the strange quark mass (in the MSbar-scheme at a scale of 2GeV) in the range 100 - 130MeV. 
M. G\"ockeler, R. Horsley, A. C. Irving, D. Pleiter, P. E. L. Rakow,   G. Schierholz, H. St\"uben and J. M. Zanotti