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A tmQCD mixed-action approach to flavour physics
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A tmQCD mixed-action approach to flavour physics
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Journal Article
A tmQCD mixed-action approach to flavour physics
2018
Overview
We discuss a mixed-action approach in which sea quarks are regularised using non-perturbatively O( a ) improved Wilson fermions, while a fully-twisted tmQCD action is used for valence quarks. In this setup, automatic O( a ) improvement is preserved for valence observables, apart from small residual O( a ) effects from the sea. A strategy for matching sea and valence is set up, and carried out for N f = 2 + 1 CLS ensembles with open boundary conditions at several simulation points. The scaling of basic light-quark observables such as the pseudoscalar meson decay constant is studied, as well as the isospin splitting of pseudoscalar meson masses.
