Probing the QCD Critical Point by Higher Moments of Net-Charge Distribution

TL;DR

This paper reports on higher moments of net-charge distributions in Au+Au collisions at 39 GeV from the STAR experiment, aiming to find signs of the QCD critical point through non-monotonic behavior analysis.

Contribution

It provides experimental measurements of higher moments of net-charge distributions at 39 GeV and compares them with theoretical models to search for the QCD critical point.

Findings

Results show no clear non-monotonic behavior indicative of the critical point.

Comparison with models helps constrain the location of the QCD critical point.

Data contributes to understanding the phase structure of QCD matter.

Abstract

The Beam Energy Scan program has been undertaken at the Relativistic Heavy Ion Collider (RHIC) to search for the QCD critical point. The presence of the critical point is expected to lead to non-monotonic behavior of several quantities. Here we report the result of higher moments of net-charge distributions for Au+Au collisions at $\sqrt{s_{NN}}$ = 39 GeV as measured by the STAR experiment. The STAR results are compared with results from HIJING event generator and Hadron Resonance (HRG) Models.