Towards leading isospin breaking effects in mesonic masses with O(a) improved Wilson fermions
PRISMA Cluster of Excellence and Institut für Kernphysik, University of Mainz, Johann-Joachim-Becher-Weg 45, 55099 Mainz, Germany
2 Helmholtz Institute Mainz, University of Mainz, 55099 Mainz, Germany
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Published online: 26 March 2018
We present an exploratory study of leading isospin breaking effects in mesonic masses using O(a) improved Wilson fermions. Isospin symmetry is explicitly broken by distinct masses and electric charges of the up and down quarks. In order to be able to make use of existing isosymmetric QCD gauge ensembles we apply reweighting techniques. The path integral describing QCD+QED is expanded perturbatively in powers of the light quark’ mass deviations and the electromagnetic coupling. We employ QEDL as a finite volume formulation of QED.
© The Authors, published by EDP Sciences, 2018
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