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.
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