Λ polarization in an exact fluid dynamical model for heavy-ion collisions

Yilong Xie,V Greco,S Pirrone,F Rizzo,C Spitaleri,M La Cognata

doi:10.1051/epjconf/201611703016

Abstract

Λ polarization is calculated in an exact analytical, rotating model based on parameters from a high resolution (3+1)D Particle-in-Cell Relativistic hydrodynamics calculation. The polarization is attributed to effects from thermal vorticity and for the first time the effects of the radial and axial acceleration are also studied separately.

Highlights

At finite impact parameters, the initial state (IS) has non-vanishing angular momentum
Thermal vorticity arises from the inverse temperature field in heavy ion collisions, and due to the non-vanishing angular momentum and shear in the initial stages
We look at polarization in effects arising from thermal vorticity in an exact rotating model [1], corresponding to an appropriate time-period of the collision based on a (3+1)D fluid dynamical model

Summary

Introduction

The initial state (IS) has non-vanishing angular momentum. Studies neglected effects arising from the nonvanishing angular momentum, but interest increased recently. With the development of hydrodynamic modeling, rotation and its consequences were studied as well. Thermal vorticity arises from the inverse temperature field in heavy ion collisions, and due to the non-vanishing angular momentum and shear in the initial stages.

Results

Conclusion