Baryon masses, chiral extrapolations, and all that

Abstract

We calculate the baryon octet masses to fourth order in chiral perturbation theory employing dimensional and cut-off regularization. We analyze the pion and kaon mass dependences of the baryon masses based on the MILC data. We show that chiral perturbation theory gives stable chiral extrapolation functions for pion (kaon) masses below 550 (600) MeV. The pion-nucleon sigma term in SU(3) is also investigated, we find σ_{πN} (0) = 50.7 - 53.7 MeV.

20 pp, 7 figs (13 eps files); more lattice data included, discussion sharpened, references added, main conclusions unchanged

References in corpus (2)

• Chiral extrapolations of baryon masses for unquenched three-flavor lattice simulations
• Cutoff schemes in chiral perturbation theory and the quark mass expansion of the nucleon mass

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• Chiral Extrapolations and the Covariant Small Scale Expansion
• Hyperons in Two Flavor Chiral Perturbation Theory
• 1/N_c corrections to the magnetic susceptibility of the QCD vacuum
• Dependence of nucleon properties on pseudoscalar meson masses
• Chiral corrections to the vector and axial couplings of quarks and baryons