Journal
PHYSICAL REVIEW D
Volume 90, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.90.054505
Keywords
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Funding
- Thailand Research Fund through the Royal Golden Jubilee Ph.D. Program [PHD/0227/2553]
- SUT
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We perform an analysis of the QCD lattice data on the baryon octet and decuplet masses based on the relativistic chiral Lagrangian. The baryon self-energies are computed in a finite volume at next-to-next-to-next-to-leading order ((NLO)-L-3), where the dependence on the physical meson and baryon masses is kept. The number of free parameters is reduced significantly down to 12 by relying on large-N-c sum rules. Altogether we describe accurately more than 220 data points from six different lattice groups, BMW, PACS-CS, HSC, LHPC, QCDSF-UKQCD and NPLQCD. Values for all counterterms relevant at (NLO)-L-3 are predicted. In particular we extract a pion-nucleon sigma term of 39(-1)(+2) MeV and a strangeness sigma term of the nucleon of sigma(sN) = 84(-4)(+28) MeV. The flavor SU(3) chiral limit of the baryon octet and decuplet masses is determined with (802 +/- 4) and (1103 +/- 6) MeV. Detailed predictions for the baryon masses as currently evaluated by the ETM lattice QCD group are made.
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