Eur. Phys. J. A (2016) 52: 299
https://doi.org/10.1140/epja/i2016-16299-2

Regular Article - Theoretical Physics

Di-nucleon structures in homogeneous nuclear matter based on two- and three-nucleon interactions

¹ Department of Physics - FCFM, University of Chile, Av. Blanco Encalada, 2008, Santiago, Chile
² CEA, DAM, DIF, F-91297, Arpajon, France
³ Department of Physics, Faculty of Engineering and Physical Sciences, University of Surrey, GU2 7XH, Guildford, UK

^* e-mail: arellano@dfi.uchile.cl

Received: 7 June 2016
Accepted: 5 August 2016
Published online: 27 September 2016

Abstract

We investigate homogeneous nuclear matter within the Brueckner-Hartree-Fock (BHF) approach in the limits of isospin-symmetric nuclear matter (SNM) as well as pure neutron matter at zero temperature. The study is based on realistic representations of the internucleon interaction as given by Argonne v₁₈, Paris, Nijmegen I and II potentials, in addition to chiral N³LO interactions, including three-nucleon forces up to N²LO. Particular attention is paid to the presence of di-nucleon bound states structures in ¹ S ₀ and ³ SD ₁ channels, whose explicit account becomes crucial for the stability of self-consistent solutions at low densities. A characterization of these solutions and associated bound states is discussed. We confirm that coexisting BHF single-particle solutions in SNM, at Fermi momenta in the range 0.13-0.3 fm^-1, is a robust feature under the choice of realistic internucleon potentials.