Flow decorrelation in heavy-ion collisions at $\sqrt{s_{_{\rm NN}}}$=27 and 200 GeV with 3D event-by-event viscous hydrodynamics

TL;DR

This paper investigates how anisotropic flow decorrelates along the longitudinal direction in heavy-ion collisions at different energies using a sophisticated 3D viscous hydrodynamic model, providing new insights into the initial state and evolution.

Contribution

It presents the first calculation of longitudinal flow decorrelation at RHIC BES energies with event-by-event viscous hydrodynamics, comparing different initial conditions and analyzing the origins of decorrelation.

Findings

Flow angle and magnitude decorrelation are separately analyzed.

Initial state eccentricity contributes to flow decorrelation.

Results help understand the longitudinal structure of the quark-gluon plasma.

Abstract

We present the first calculation of longitudinal decorrelation of anisotropic flow at RHIC Beam Energy Scan (BES) energies using event-by-event viscous hydrodynamic model (vHLLE), with two different initial states (GLISSANDO2 and UrQMD) and hadronic cascade. We investigate the origin of the observed decorrelation by checking separately flow angle and flow magnitude decorrelation and by calculating decorrelation in the initial state eccentricity.