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We determine f_K for lattice QCD in the two flavor approximation withnon-perturbatively improved Wilson fermions. The result is used to set thescale for dimensionful quantities in CLS/ALPHA simulations. To control itsdependence on the light quark mass, two different strategies for the chiralextrapolation are applied. Combining f_K and the bare strange quark mass withnon-perturbative renormalization factors and step scaling functions computed inthe Schroedinger Functional, we determine the RGI strange quark mass and theLambda parameter in units of f_K.

Strange quark mass and Lambda parameter by the ALPHA collaboration