Differential Hanbury-Brown-Twiss for an exact hydrodynamic model with rotation

TL;DR

This paper presents an exact rotating and expanding hydrodynamic model for heavy ion collisions, incorporating rotation decay due to expansion, with parameters based on realistic 3+1D calculations at TeV energies, highlighting Kelvin Helmholtz Instability effects.

Contribution

It introduces an exact hydrodynamic solution that models rotation and expansion in heavy ion collisions, including rotation decay mechanisms and instability effects.

Findings

Rotation is enhanced by Kelvin Helmholtz Instability.

The model aligns with realistic 3+1D hydrodynamic parameters.

Rotation decay due to expansion is quantitatively described.

Abstract

We study an exact rotating and expanding solution of the fluid dynamical model of heavy ion reactions, that take into account the rate of slowing down of the rotation due to the longitudinal and transverse expansion of the system. The parameters of the model are set on the basis of realistic 3+1D fluid dynamical calculation at TeV energies, where the rotation is enhanced by the build up of the Kelvin Helmholtz Instability in the flow.