Electromagnetic properties of hadrons via the $u-d$ mass difference and direct photon exchange

Abstract

We demonstrate that a $u-d$ mass difference (which we estimate to be about 4 MeV) within quantum loops, can reproduce the effects of the Coleman-Glashow electromagnetic tadpole operator.

14 pages, RevTeX. Replacement includes $a_0$ tadpole contribution. To appear in Phys Rev D