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Título: | Lowest-lying baryon masses in covariant SU(3)-flavor chiral perturbation theory |
Autor: | Martín Cámalich, Jorge CSIC ORCID; Geng, Li Sheng; Vicente Vacas, Manuel J. CSIC ORCID | Fecha de publicación: | 19-oct-2010 | Editor: | American Physical Society | Citación: | Physical Review - Section D - Particles and Fields 82 (7): 074504 (2010) | Resumen: | 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. | Versión del editor: | http://dx.doi.org/10.1103/PhysRevD.82.074504 | URI: | http://hdl.handle.net/10261/29128 | DOI: | 10.1103/PhysRevD.82.074504 | ISSN: | 1550-7998 |
Aparece en las colecciones: | (IFIC) Artículos |
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lowest lying baryon.pdf | 147,55 kB | Adobe PDF | Visualizar/Abrir |
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