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Towards leading isospin breaking effects in mesonic masses with <i>O</i>(<i>a</i>) improved Wilson fermions
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 …