期刊
PHYSICAL REVIEW D
卷 86, 期 11, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.86.114511
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资金
- DFG [SFB/TR 55]
- EU [283286, 227431, 238353, 228398 (HPC-EUROPA2)]
- Australian Research Council [FT100100005]
- STFC [ST/J000493/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/J000493/1] Funding Source: researchfish
Using an SU(3) flavor symmetry breaking expansion in the quark mass, we determine the QCD component of the nucleon, Sigma and Xi mass splittings of the baryon octet due to up-down (and strange) quark mass differences in terms of the kaon mass splitting. Provided the average quark mass is kept constant, the expansion coefficients in our procedure can be determined from computationally cheaper simulations with mass-degenerate sea quarks and partially quenched valence quarks. Both the linear and quadratic terms in the SU(3) flavor symmetry breaking expansion are considered; it is found that the quadratic terms only change the result by a few percent, indicating that the expansion is highly convergent. DOI: 10.1103/PhysRevD.86.114511
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