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arXiv · 1003.1929

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

J. Martin-Camalich·L. S. Geng·M. J. Vicente Vacas
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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.

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J. Martin-Camalich, L. S. Geng, M. J. Vicente Vacas. 2010-11-19. The lowest-lying baryon masses in covariant SU(3)-flavor chiral perturbation theory. https://doi.org/10.1103/physrevd.82.074504

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