Baryon masses, chiral extrapolations, and all that

Details Baryon masses, chiral extrapolations, and all that Baryon masses, chiral extrapolations, and all that

2005-01-26

arxiv.org/abs/hep-lat/0501024v3

Eur.Phys.J. A24 (2005) 395-409

Physics

High Energy Physics

High Energy Physics - Lattice

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

Scientific paper

10.1140/epja/i2005-10063-9

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 \sigma_{\pi N} (0) = 50.7 - 53.7 MeV.

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