The strange quark mass and Lambda parameter of two flavor QCD
  We complete the non-perturbative calculations of the strange quark mass and the Lambda parameter in two flavor QCD by the ALPHA collaboration. The missing lattice scale is determined via the kaon decay constant, for whose chiral extrapolation complementary strategies are compared. We also give a value for the scale r_0 in physical units as well as an improved determination of the renormalization constant Z_A. 
Patrick Fritzsch, Francesco Knechtli, Bj\"orn Leder, Marina   Marinkovic, Stefan Schaefer, Rainer Sommer and Francesco Virotta
hep-lat hep-ph