Abstract
The charge radii of octet-baryons obtained in quenched lattice-QCD calculations are extrapolated within heavy-baryon chiral perturbation theory. Finite-range regularization is applied to improve the convergence of the chiral expansion and to provide estimates of quenching artifacts. Lattice values of quark distribution radii and baryon charge radii for ${m}_{\ensuremath{\pi}}^{2}$ in the range $(0.1,0.7)\text{ }\text{ }{\mathrm{GeV}}^{2}$ are described very well with finite-range regularization. Upon estimating corrections for both finite-volume and quenching effects, the obtained charge radii of the proton, neutron and ${\ensuremath{\Sigma}}^{\ensuremath{-}}$ are in good agreement with experimental measurements. The predicted charge radii of the remaining octet-baryons have not yet been measured and present a challenge to future experiments.
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