Intermittency of charged particles in the hybrid $\mathrm{UrQMD}+\mathrm{CMC}$ model at energies available at the BNL Relativistic Heavy Ion Collider

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

Jin Wu, Zhiming Li, Xiaofeng Luo, Mingmei Xu, and Yuanfang Wu

Phys. Rev. C 106, 054905 – Published 16 November 2022

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 $\sqrt{s_{N N}} = 7.7$ –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.