The ratio mc/ms with Wilson fermions
Abstract
We determine the quark mass ratio mc/ms on the lattice, using Wilson-type fermions. Configurations with Nf=2 dynamical clover-improved fermions by the QCDSF collaboration are used, which were made available through the ILDG. In the valence sector we use a sophisticated, mass-independently O(a)-improved Wilson-type action with small cut-off effects even in the charm mass region. After an extrapolation to the physical pion mass, to zero lattice spacing and to infinite box volume, we find mc/ms=11.27(30)(26).
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