Microscopic calculation of the repulsive core in the elastic nucleon-nucleon scattering

The resonating group method is used to study the effective potential between two nucleons, due to the confining potential between quarks taken together with the Pauli principle for quarks. The potential used has harmonic form, unitary spin factor lambda(1) x lambda(2), and both ordinary and spin-spin components. Its parameters are determined by appeal to experimental data, and phase shifts are calculated for the 1S0 and 3S1 states of the nucleon-nucleon (NN) system. The results indicate that the repulsive core in the NN potential may arise from quark antisymmetrization required if nucleons are composed of quarks. (orig.)