Thursday, September 6, 2012

1209.0980 (P. C. Bruns et al.)

Chiral extrapolation of baryon mass ratios    [PDF]

P. C. Bruns, L. Greil, A. Schäfer
We analyze lattice data for octet baryon masses from the QCDSF collaboration employing manifestly covariant Baryon Chiral Perturbation Theory. It is shown that certain combinations of low-energy constants can be fixed more accurately than before from this data. We also examine the impact of this analysis on the pion-nucleon sigma term, and on the convergence properties of baryon mass expansions in the SU(3) symmetry limit.
View original: http://arxiv.org/abs/1209.0980

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