2022/12/14 by Segner, Alexander M., Hanlon, Andrew D., Risch, Andreas +1
#FOS: Physical sciences #High Energy Physics - Lattice (hep-lat)
paper · doi:10.48550/arxiv.2212.07176
We present the status of an ongoing project aimed at the inclusion of isospin-breaking corrections arising from the non-degeneracy of the light quark masses and electromagnetic interactions in calculations of the low-lying octet and decuplet baryon masses. Our ultimate goal is to perform a precision determination of the lattice scale including isospin-breaking effects. We apply the perturbative formalism to isospin-symmetric Nf=2+1 CLS ensembles. We show results on baryon masses up to leading order in isospin-breaking corrections on two ensembles with mπ≈290 MeV and mπ≈215 MeV at a lattice spacing of a≈0.076 fm.