If I'm not wrong this coupling of isospin states of the sigma meson could even have implications at nucleon level. Especially if it really is the mediator of the strong force as has been speculated over the last few decades.
The nuclear-magnetic spin orbit force (not electro-magnetic) is not conserved. Under certain conditions it can dramatically increase in range. I said this 18 years ago at a meeting of ANS-2000 and it was published by ANS. The condition is: "The constants of the motion tend toward the electromagnetic in a Bose condensate that is stimulated at a a dimensional frequency of 1,094,000 metes per second." No-one else has been this precise. Frank Z
