We determine f_K for lattice QCD in the two flavor approximation with non-perturbatively improved Wilson fermions. The result is used to set the scale for dimensionful quantities in CLS/ALPHA simulations. To control its dependence on the light quark mass, two different strategies for the chiral extrapolation are applied. Combining f_K and the bare strange quark mass with non-perturbative renormalization factors and step scaling functions computed in the Schroedinger Functional, we determine the RGI strange quark mass and the Lambda parameter in units of f_K.
@article{arxiv.1112.4163,
title = {Strange quark mass and Lambda parameter by the ALPHA collaboration},
author = {Marina Marinkovic and Stefan Schaefer and Rainer Sommer and Francesco Virotta},
journal= {arXiv preprint arXiv:1112.4163},
year = {2011}
}
Comments
7 pages, 4 figures; talk given at LATTICE 2011, XXIX International Symposium on Lattice Field Theory, July 11-16 2011, Squaw Valley, Lake Tahoe, California