Chiral symmetry restoration in heavy-ion collisions at intermediate energies

TL;DR

This paper investigates how chiral symmetry restoration influences heavy-ion collision outcomes at intermediate energies using the PHSD transport model, considering different nuclear equations of state to assess uncertainties.

Contribution

It introduces a detailed study of CSR effects in heavy-ion collisions within the PHSD framework, incorporating various nuclear EoS parametrizations to evaluate model uncertainties.

Findings

CSR impacts observable outcomes in heavy-ion collisions.

Different nuclear EoS parametrizations lead to varying CSR effects.

The study provides estimates of uncertainties in CSR-related predictions.

Abstract

We study the effect of the chiral symmetry restoration (CSR) on heavy-ion collisions observables in the energy range $\sqrt{s_{NN}}$=3-20 GeV within the Parton-Hadron-String Dynamics (PHSD) transport approach. The PHSD includes the deconfinement phase transition as well as essential aspects of CSR in the dense and hot hadronic medium, which are incorporated in the Schwinger mechanism for the hadronic particle production. We adopt different parametrizations of the nuclear equation of state from the non-linear $\sigma-\omega$ model, which enter in the computation of the quark scalar density for the CSR mechanism, in order to estimate the uncertainty in our calculations.