ACCOUNT OF NON-NUCLEONIC DEGREES OF FREEDOM IN NUCLEAR MATTER

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Abstract

A two-component formalism has been developed for the reaction matrix in a nuclear medium in the case of nucleon–nucleon interaction taking into account additional non-nucleonic degrees of freedom. The approach is based on the dibaryon model of nucleon-nucleon interaction, which recently allowed to describe partial 𝑁𝑁 scattering amplitudes for the channels with total angular momentum 𝐽 ≤ 3 in a wide energy range fromzero to 0.6–1 GeV, and also to reproduce successfully the positions of the known dibaryon resonances for a number of channels. The bound states in the nuclear medium that arise for such a model are studied. An equation of state for symmetric nuclear matter has been calculated within the framework of the Brueckner–Hartree–Fock scheme.

About the authors

O. A. Rubtsova

Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University

Email: rubtsova@nucl-th.sinp.msu.ru
Russia

V. N. Pomerantsev

Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University

Email: pomeran@nucl-th.sinp.msu.ru
Russia

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