Hadron yields, the chemical freeze-out and the QCD phase diagram

TL;DR

This paper reviews the current understanding of chemical freeze-out in heavy-ion collisions, analyzing hadron yields at the LHC to explore the QCD phase diagram and the production of various hadrons.

Contribution

It provides an updated analysis of hadron yield data at the LHC using the statistical hadronization model, including J/ψ production and implications for the QCD phase diagram.

Findings

Hadron yields at the LHC are well described by the thermal model.

The model's application to J/ψ production offers insights into quark-gluon plasma.

Implications for the QCD phase diagram are discussed.

Abstract

We present the status of the chemical freeze-out, determined from fits of hadron yields with the statistical hadronization (thermal) model, with focus on the data at the LHC. A description of the yields of hadrons containing light quarks as well as the application of the model for the production of the J/$\psi$ meson is presented. The implications for the QCD phase diagram are discussed.