Lambda Polarization in an Exact Rotating and Expanding fluid dynamical model for peripheral heavy ion reactions

TL;DR

This paper presents an exact analytical model to calculate Lambda polarization in peripheral heavy ion reactions, incorporating effects of thermal vorticity, radial, and axial acceleration based on relativistic hydrodynamics.

Contribution

It introduces a novel analytical approach that includes acceleration effects in polarization calculations, extending previous models focused mainly on thermal vorticity.

Findings

Polarization influenced by thermal vorticity and acceleration effects

First separation of radial and axial acceleration impacts on polarization

Model aligns with high-resolution hydrodynamics data

Abstract

We calculate the Lambda polarization in an exact analytical, rotating model based on parameters extracted 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