Evidence of the QCD tricritical endpoint existence at NICA-FAIR energies

TL;DR

This paper discusses potential signals of phase transitions in QCD matter at specific collision energies, providing evidence for a tricritical endpoint in the QCD phase diagram around 8.7-9.2 GeV.

Contribution

It presents possible experimental signals indicating the existence of a tricritical endpoint in the QCD phase diagram at NICA-FAIR energies.

Findings

Signals of chiral symmetry restoration and deconfinement identified.

Evidence supporting the tricritical endpoint at 8.7-9.2 GeV.

Equation of state analyzed with restored chiral symmetry.

Abstract

We present a summary of possible signals of the chiral symmetry restoration and deconfinement phase transitions which may be, respectively, probed at the center of mass collision energies at 4.3-4.9 GeV and above 8.7-9.2 GeV. It is argued that these signals may evidence for an existence of the tricritical endpoint of QCD phase diagram at the collision energy around 8.7-9.2 GeV. The equation of state of hadronic matter with the restored chiral symmetry is discussed and the number of bosonic and fermionic degrees of freedom is found.