The lowest-lying baryon masses in covariant SU(3)-flavor chiral perturbation theory

Abstract

We present an analysis of the baryon-octet and -decuplet masses using covariant SU(3)-flavor chiral perturbation theory up to next-to-leading order. Besides the description of the physical masses we address the problem of the lattice QCD extrapolation. Using the PACS-CS collaboration data we show that a good description of the lattice points can be achieved at next-to-leading order with the covariant loop amplitudes and phenomenologically determined values for the meson-baryon couplings. Moreover, the extrapolation to the physical point up to this order is found to be better than the linear one given at leading-order by the Gell-Mann-Okubo approach. The importance that a reliable combination of lattice QCD and chiral perturbation theory may have for hadron phenomenology is emphasized with the prediction of the pion-baryon and strange-baryon sigma terms.

Typos in formulas corrected

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Cited by in corpus (19)

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• Octet-baryon axial-vector charges and SU(3)-breaking effects in the semileptonic hyperon decays
• Scalar strangeness content of the nucleon and baryon sigma terms
• Accurate relativistic chiral nucleon-nucleon interaction up to NNLO
• The masses and axial currents of the doubly charmed baryons
• Scale setting and the light baryon spectrum in $N_f=2+1$ QCD with Wilson fermions
• Faddeev-Chiral Unitary Approach to the $K^{-}d$ scattering length
• Chiral extrapolation of baryon mass ratios
• Leading order mesonic and baryonic SU(3) low energy constants from $N_f=3$ lattice QCD
• Light quark mass dependence of the $D$ and $D_s$ decay constants
• Systematic study of octet-baryon electromagnetic form factors in covariant chiral perturbation theory
• Low-energy constants in the chiral Lagrangian with baryon octet and decuplet fields from Lattice QCD data on CLS ensembles
• Octet and decuplet baryon $\sigma$-terms and mass decompositions
• Reexamination of antinucleon-nucleon interactions in covariant chiral effective field theory
• Pion-nucleon scattering with decuplet contribution in heavy baryon SU(3) chiral perturbation theory
• Peripheral nucleon-nucleon scattering at next-to-next-to-leading order in SU(3) heavy baryon chiral perturbation theory
• Thermodynamics and quark condensates of three-flavor QCD at low temperature