Determination of csw in Nf=3+1 Lattice QCD with massive Wilson fermions
Abstract
We develop a strategy for the non-perturbative determination of the O(a)-improvement coefficient csw for Wilson fermions with massive sea quarks. The improvement condition is defined via the PCAC relation in the Schr\"odinger functional. It is imposed along a line of constant physics designed to be close to the correct mass of the charm quark. The numerical work uses the tree-level improved L\"uscher-Weisz gauge action in Nf=3+1 Lattice QCD.
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