Hydrodynamic fluctuations and dissipation in an integrated dynamical model

TL;DR

This paper introduces a comprehensive 3-D dynamical model incorporating hydrodynamic fluctuations to study their impact on flow harmonics in high-energy nuclear collisions.

Contribution

It presents a novel integrated model combining hydrodynamic fluctuations with initial-state fluctuations in a full 3-D simulation framework.

Findings

Hydrodynamic fluctuations significantly affect flow harmonic distributions.

Event-by-event simulations reveal the impact of fluctuations on observables.

The model provides new insights into the role of fluctuations in nuclear collision dynamics.

Abstract

We develop a new integrated dynamical model to investigate the effects of the hydrodynamic fluctuations on observables in high-energy nuclear collisions. We implement hydrodynamic fluctuations in a fully 3-D dynamical model consisting of the hydrodynamic initialization models of the Monte-Carlo Kharzeev-Levin-Nardi model, causal dissipative hydrodynamics and the subsequent hadronic cascades. By analyzing the hadron distributions obtained by massive event-by-event simulations with both of hydrodynamic fluctuations and initial-state fluctuations, we discuss the effects of hydrodynamic fluctuations on the flow harmonics, $v_n$ and their fluctuations.