# Relativistic self-energy decomposition of nuclear symmetry energy and equation of state of neutron matter within QCD sum rules

## TL;DR

This paper uses QCD sum rules to analyze the relativistic self-energy decomposition of nuclear symmetry energy and the equation of state of neutron matter, linking non-perturbative QCD vacuum properties to dense nuclear matter.

## Contribution

It demonstrates that QCD sum rules can quantitatively explore asymmetric nuclear matter properties and connect them to the non-perturbative QCD vacuum, especially at lower densities.

## Key findings

- QCDSR effectively describes properties of asymmetric nuclear matter at low densities.
- The approach links the EOS of neutron matter to QCD vacuum characteristics.
- Provides insights into the uncertainties of symmetry energy from a QCD perspective.

## Abstract

Abstract (abridged edition): Properties of the relativistic nucleon self-energy decomposition of the symmetry energy as well as the equation of state (EOS) of pure neutron matter (PNM) are explored systematically within the QCD sum rules (QCDSR). Our results in the present work have demonstrated that the QCDSR approach can be used to explore the properties of asymmetric nuclear matter (ANM) in a quantitative manner, at least in lower density region. The QCDSR approach establishes a bridge connecting the EOS of ANM and the non-perturbative QCD vacuum, and thus provides a useful way to understand the properties of dense nucleonic matter from non-perturbative QCD vacuum. These studies are helpful to investigate the QCD origins about the uncertainties of nucleonic matter properties, e.g., the uncertainties of the symmetry energy. On the other hand, the exact knowledge on the EOS of ANM extracted from experiments, observations and model-independent calculations is also very useful for understanding the quark/gluon condensates in nuclear medium, which can provide important information on the chiral symmetry restoration phase transition in nuclear matter as well as the in-medium effects of hadron properties.