Baryon self-energies in relativistic chiral SU(3) effective theory

We calculate the self-energies of the flavor SU(3) octet and decuplet baryons, using a relativistic chiral effective theory framework consistent with Lorentz and gauge invariance. The results are compared using several different regularization prescriptions, including finite-range regularization, Pauli-Villars, and dimensional regularization, which are shown to yield the same leading nonanalytic behaviors in the chiral limit, as expected in QCD. Using the same chiral effective theory framework, we also compute the pseudoscalar meson loop contributions to flavor asymmetries in parton distributions, such as the $\bar d - \bar u$ and $s-\bar s$ quark asymmetries in the proton.