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- W2135432521 abstract "We extend a previous analysis of the lowest-lying octet baryon masses in covariant baryon chiral perturbation theory (ChPT) by explicitly taking into account the contribution of the virtual decuplet baryons. Up to next-to-next-to-next-to-leading order (N$^3$LO), the effects of these heavier degrees of freedom are systematically studied. Their effects on the light-quark mass dependence of the octet baryon masses are shown to be relatively small and can be absorbed by the available low-energy constants up to N$^3$LO. Nevertheless, a better description of the finite-volume corrections of the lattice QCD data can be achieved, particularly those with small $M_phi L$ ($<4$), which is demonstrated by a careful study of the NPLQCD and QCDSF-UKQCD small-volume data. Finally, we show that the predicted pion- and strangeness-baryon sigma terms are only slightly changed by the inclusion of the virtual decuplet baryons." @default.
- W2135432521 created "2016-06-24" @default.
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- W2135432521 date "2013-04-02" @default.
- W2135432521 modified "2023-09-23" @default.
- W2135432521 title "Virtual decuplet effects on octet baryon masses in covariant baryon chiral perturbation theory" @default.
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- W2135432521 doi "https://doi.org/10.1103/physrevd.87.074001" @default.
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