https://doi.org/10.1051/epjconf/201817513018
A tmQCD mixed-action approach to flavour physics
1
Instituto de Física Teórica UAM-CSIC, c/Nicolás Cabrera 13-15, Universidad Autónoma de Madrid, E-28049 Madrid, Spain
2
Department of Theoretical Physics, Universidad Autónoma de Madrid, E-28049 Madrid, Spain
* Speaker, e-mail: ja.romero@csic.es
** Speaker, e-mail: javier.ugarrio@uam.es
Published online: 26 March 2018
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 Nf = 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.
© The Authors, published by EDP Sciences, 2018
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