Importance of Granular Structure in the Initial Conditions for the Elliptic Flow

TL;DR

This paper demonstrates that the granular structure of initial conditions in hydrodynamic models significantly influences elliptic flow and particle distribution, affecting observable outcomes in high-energy nucleus collisions.

Contribution

It introduces the impact of granular initial conditions on elliptic flow and high-pT particle production, highlighting effects previously underexplored.

Findings

Granular structure enhances high-pT isotropic particle production.

It reduces elliptic flow v2 in forward and backward regions.

Granular initial conditions significantly alter flow observables.

Abstract

We show effects of granular structure of the initial conditions (IC) of hydrodynamic description of high-energy nucleus-nucleus collisions on some observables, especially on the elliptic-flow parameter v2. Such a structure enhances production of isotropically distributed high-pT particles, making v2 smaller there. Also, it reduces v2 in the forward and backward regions where the global matter density is smaller, so where such effects become more efficacious.