Baryonic spin Hall effects in Au+Au collisions at $\sqrt{s_{NN}} = 7.7-200$ GeV

TL;DR

This paper predicts the baryonic spin Hall effect in heavy-ion collisions at RHIC energies by analyzing local net Lambda polarization, suggesting measurable signatures that could confirm the effect in quark-gluon plasma.

Contribution

It introduces a novel prediction of the baryonic spin Hall effect using hydrodynamic simulations and proposes specific polarization observables for experimental detection.

Findings

Prediction of local net Lambda polarization as a signature of baryonic SHE.

Proposal of using Fourier coefficients of net spin polarization to quantify the effect.

Potential experimental confirmation of baryonic SHE in QCD matter.

Abstract

In this proceeding, we present our recent prediction on the local net Lambda polarization to search for the baryonic spin Hall effect (SHE) at RHIC BES energies. The baryonic SHE is induced by the gradients of baryon chemical potential, which leads to local polarization separation between baryons and anti-baryons. Based on hydrodynamic simulations with spin Cooper-Fryer formula, we propose to use $P^{{\rm net}}_{2,y}$ and $P^{{\rm net}}_{2,z}$, the second Fourier coefficients of net spin polarization to quantify this baryonic SHE. Future experimental observation of their non-trivial signatures could strongly support the existence of the baryon SHE in hot and dense QCD matter.