Intermittency of charged particles in the hybrid UrQMD+CMC model at energies available at the BNL Relativistic Heavy Ion Collider

TL;DR

This study integrates critical fluctuations into a hybrid UrQMD+CMC model to analyze intermittency in charged particle production at RHIC energies, revealing power-law behavior consistent with experimental data and potential signals of critical phenomena.

Contribution

The paper introduces a hybrid UrQMD+CMC model incorporating critical fluctuations to study intermittency in heavy-ion collisions, providing a new approach to locate the QCD critical point.

Findings

Power-law behavior of scaled factorial moments observed

Scaling exponent matches experimental data with 1-2% intermittency signal

Model reproduces critical fluctuation signatures in charged particle production

Abstract

Within the framework of intermittency analysis, a search for critical fluctuations is ongoing to locate the possible critical point in the quantum chromodynamics phase diagram. In this study, self-similar critical fluctuations from a critical Monte Carlo (CMC) model have been incorporated into the cascade ultrarelativistic quantum molecular dynamics (UrQMD) model. This hybrid UrQMD+CMC model exhibits a clear power-law behavior of scaled factorial moment for charged particles in Au+Au collisions at $\sqrt{s_\mathrm{NN}}$ = 7.7-200 GeV. By comparing the UrQMD+CMC model results with those from the STAR experiment, it is found that the value of a calculated scaling exponent falls in the range of the experimental measurement when 1-2 \% signal of intermittency fluctuations is added into the UrQMD sample.