Pion Radius and Isovector Nucleon Radii in the Limit of Small Pion Mass

Abstract
We study the pion radius and the isovector nucleon radii in the limit in which the pion mass approaches zero. The leading terms in this limit are calculated. DOI: http://dx.doi.org/10.1103/PhysRevD.6.2912 © 1972 The American Physical Society