Nuclear matter superfluidity in an effective hadronic field model with excluded volume corrections

TL;DR

This paper investigates the properties of the 1S0 superfluid phase in symmetric nuclear matter at finite temperature using a covariant hadronic field model with density-dependent correlations, employing a self-consistent Hartree-Bogoliubov approach.

Contribution

It introduces an effective hadronic model with excluded volume corrections to study nuclear matter superfluidity, providing a comparison with other hadronic models and microscopic potentials.

Findings

Qualitative agreement with microscopic potential studies on superfluid gap

Inclusion of density-dependent correlations enhances model realism

Model captures main features of superfluid phase in nuclear matter

Abstract

Properties of the 1S0 superfluid phase are studied for symmetric nuclear matter at finite temperature. It is described within a covariant hadronic field model, of the sigma-omega type, with addition of density dependent correlations simulating effects due to finite extension of nucleons. The model is solved in a selfconsistent Hartree-Bogoliubov approach, assuming instantaneous interactions in the superfluid phase. A comparison with the results obtained from several hadronic field models is done. Main characteristics of our description of the superfluid gap are in qualitative agreement with some studies using microscopic potentials, although further refinements could improve its performance.