Fluctuations and initial state granularity in heavy ion collisions and their effects on observables from hydrodynamics

TL;DR

This paper compares smooth and event-by-event initial conditions in hydrodynamic models of relativistic nuclear collisions, highlighting the impact on observables like directed flow and providing new insights into initial state fluctuations.

Contribution

It introduces a detailed comparison between smooth and fluctuating initial conditions in hydrodynamic simulations, including new results on directed flow.

Findings

Differences in flow observables between initial condition types

Impact of fluctuations on hydrodynamic evolution

New results on directed flow behavior

Abstract

A comparison is made between results obtained using smooth initial conditions and event-by-event initial conditions in the hydrodynamical description of relativistic nuclear collisions. Some new results on directed flow are also included.