Identified particle production and freeze-out properties in heavy-ion collisions at RHIC Beam Energy Scan program

TL;DR

This study analyzes identified particle production and freeze-out properties in heavy-ion collisions at various energies from the RHIC Beam Energy Scan, providing insights into the QCD phase diagram through particle yields and ratios.

Contribution

It presents new measurements of particle yields and ratios at multiple energies, enhancing understanding of chemical freeze-out in heavy-ion collisions.

Findings

Particle yields and ratios vary with collision energy.

Chemical freeze-out parameters are extracted across energies.

Results contribute to mapping the QCD phase diagram.

Abstract

The first phase of Beam Energy Scan (BES) program at the Relativistic Heavy-Ion Collider (RHIC) was started in the year 2010 with the aim to study the several aspects of the quantum chromodynamics (QCD) phase diagram. The Solenoidal Tracker At RHIC (STAR) detector has taken data at $\sqrt{s_{NN}} = $ 7.7, 11.5, 19.6, 27, and 39 GeV in Au+Au collisions in the years 2010 and 2011 as part of the BES programme. For these beam energies, we present the results on the particle yields, average transverse mass and particle ratios for identified particles in mid-rapidity ($|y|$ < 0.1). The measured particle ratios have been used to study the chemical freeze-out dynamics within the framework of a statistical model.