The ratio m_c/m_s with Wilson fermions
Stephan Durr, Giannis Koutsou
TL;DR
This paper calculates the ratio of charm to strange quark masses using lattice QCD with Wilson fermions, achieving a precise determination after extrapolations to physical conditions.
Contribution
It provides a new, precise lattice QCD determination of the quark mass ratio m_c/m_s using Wilson-type fermions with improved actions and configurations from the QCDSF collaboration.
Findings
m_c/m_s=11.27(30)(26) after extrapolations
Uses Wilson-type fermions with small cut-off effects
Employs configurations with N_f=2 dynamical clover-improved fermions
Abstract
We determine the quark mass ratio m_c/m_s on the lattice, using Wilson-type fermions. Configurations with N_f=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 m_c/m_s=11.27(30)(26).
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