Particle mixing and charge asymmetric nuclear forces

The charge asymmetric effect of rhoω and πeta electromagnetic mixing on the 1S0 NN potential is reviewed. It is found that the rhoω contribution dominates and leads to an n-n potential which is more attractive than the p-p potential. The shift in the scattering lengths is then calculated to be mod(a sub(nn))-mod(a sub(pp)) approximately 0.9 fm and the shift in effective ranges is rsub(nn)-rsub(pp) approximately -0.02 fm. (Auth.)