Nucleons in Two-Flavor Partially-Quenched Chiral Perturbation Theory
  Properties of the proton and the neutron are explored in partially-quenched chiral perturbation theory with two non-degenerate light flavors. Masses, magnetic moments, matrix elements of isovector twist-2 operators and axial-vector currents are computed at the one-loop level in the chiral expansion. 
Silas R. Beane and Martin J. Savage