THE EFFECTS OF NUCLEON QUARK SUBSTRUCTURE ON THE 3He-3H ELECTROMAGNETIC MASS DIFFERENCE

It is argued that the neglect of intrinsic quark motions within the nucleon implicit in traditional nuclear estimates of magnetic contributions to the A=3 binding energy difference produces an underestimate of the size of these contributions. A schematic non-relativistic quark model calculation demonstrates that the magnitude of the discrepancy is unlikely to be neglible, and that the sign of the effect is such as to require an increase in charge symmetry breaking from other sources.