Dense nucleonic matter and the renormalization group

TL;DR

This paper uses the functional renormalization group within a chiral nucleon-meson model to study dense nucleonic matter and the QCD phase diagram, revealing a separation between freeze-out and chiral restoration at high densities.

Contribution

It introduces a model that incorporates fluctuations via the functional renormalization group to analyze the QCD phase diagram with realistic nuclear matter properties.

Findings

Good agreement with chiral effective field theory results.

Identification of a separation between chemical freeze-out and chiral symmetry restoration.

Model reproduces the nuclear liquid-gas phase transition.

Abstract

Fluctuations are included in a chiral nucleon-meson model within the framework of the functional renormalization group. The model, with parameters fitted to reproduce the nuclear liquid-gas phase transition, is used to study the phase diagram of QCD. We find good agreement with results from chiral effective field theory. Moreover, the results show a separation of the chemical freeze-out line and chiral symmetry restoration at large baryon chemical potentials.