PT Journal
AU Martin Camalich, J
   Geng, LS
   Vicente Vacas, MJ
TI Lowest-lying baryon masses in covariant SU(3)-flavor chiral perturbation theory
SO Physical Review D
JI Phys. Rev. D
PY 2010
BP 074504
EP 7pp
VL 82
IS 7
DI 10.1103/PhysRevD.82.074504
LA English
AB 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.
ER