The saturating effect of the Δ(1236) in nuclear matter

Abstract

Abstract It is shown that the explicit introduction of the Δ(1236) into the two-nucleon interaction gives rise in nuclear matter to a repulsive contribution to the binding energy of 5 MeV per particle at k F = 1.4 fm −1 . This contribution increases approximately as the square of the density. The effect is found using both the Pandharipande and Brueckner approaches with quantitative agreement between the two. A brief discussion is made of the compensating three-body force contribution.