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Lowest-lying baryon masses in covariant SU(3)- flavor chiral perturbation theory
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Lowest-lying baryon masses in covariant SU(3)- flavor chiral perturbation theory
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| Martín Camalich, Jorge; Geng, Li Sheng; Vicente Vacas, Manuel José Perfil | |||
| This document is a artículoDate2010 | |||
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Este documento está disponible también en : http://hdl.handle.net/10550/39487 |
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| 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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Martín Camalich, Jorge Geng, Li Sheng Vicente Vacas, Manuel José 2010 Lowest-lying baryon masses in covariant SU(3)- flavor chiral perturbation theory Physical Review D 82 7 074504 |
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| http://dx.doi.org/10.1103/PhysRevD.82.074504 |
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22 - Física [3699]