Isospin-breaking Effects in Octet and Decuplet Baryon Masses
Abstract
We present work designed to compute baryon masses on Nf = 2 + 1 CLS ensembles including isospin-breaking effects due to non-degenerate light quark masses and electromagnetic interactions. These effects are determined at leading order via a perturbative expansion around the iso-symmetric theory. We furthermore apply a group-theoretical operator construction for the various interpolators describing the different members of the baryon octet and decuplet based on a classification by spin, parity, and flavor content.
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