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Isospin-breaking Effects in Octet and Decuplet Baryon Masses

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arxiv 2112.08262 v1 pith:F3HVZOJA submitted 2021-12-15 hep-lat

Isospin-breaking Effects in Octet and Decuplet Baryon Masses

Alexander M. Segner , Andrew D. Hanlon , Renwick J. Hudspith , Andreas Risch , Hartmut Wittig This is my paper
classification hep-lat
keywords baryoneffectsmassesdecupletisospin-breakingoctetapplyaround
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We present work designed to compute baryon masses on $N_f = 2 + 1$ 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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