# Fluctuations of identified particle yields using the {\nu} dyn variable at energies available at the BNL Relativistic Heavy Ion Collider

## TL;DR

This paper investigates fluctuations of identified particle yields in heavy-ion collisions using the {
u} dyn variable across different models and energies, highlighting model-dependent behaviors and particle species effects in the QGP medium.

## Contribution

It introduces a comparative analysis of particle yield fluctuations using {
u} dyn across models and energies, emphasizing the particle species dependence of diffusion coefficients in QGP.

## Key findings

- $D$ strongly depends on $ riangle
abla$ in HIJING and UrQMD, but not in HRG.
- Diffusion coefficients are energy-independent but vary with particle species.
- Provides a baseline for experimental data comparison.

## Abstract

We study the fluctuations of net-charge, net-pion, net-kaon and net-proton using $D$-measure and $\nu_{dyn}$ variables in heavy-ion jet interaction generator (HIJING), ultra-relativistic quantum molecular dynamics (UrQMD), and hadron resonance gas (HRG) model at different collision energies \sqsn. It has been observed that, the values of $D$ strongly dependent on $\Delta \eta$ in HIJING and UrQMD models and independent in HRG model. The diffusion coefficients ($\sigma$) of identified particles are estimated at various \sqsn. It is observed that, the $\sigma$ values are independent of collision energies but emphasizes the particle species dependence of diffusion coefficient in the QGP medium. This study provides a realistic baseline for comparison with the experimental data.