On u-d Quark Coulomb Origin of Nuclear Force

The origin of nuclear force is assigned to Coulomb interactions between quarks, u and d, in neighboring nucleons, replacing the current unspecified “residual” strong interaction assignment. The deuteron binding energy is correctly estimated using quasi-classical models for nucleons based upon SSI, the scalar strong interaction hadron theory. The next lightest nuclei are analogously treated. The Coulomb binding energies depend upon the small, in principle observable, internucleon distances between such u and d quarks whose positions in their respective host nucleons however depend upon intranucleon strong u - d potential that span over larger “hidden” distances.