Global polarization and spin alignment measurements

TL;DR

This paper reviews recent experimental findings on global hyperon polarization and vector meson spin alignment in heavy-ion collisions, highlighting energy and particle dependence, and discusses future research directions for understanding local vorticity fields.

Contribution

It provides a comprehensive review of recent measurements of polarization and spin alignment, including new results at the LHC and future outlooks for the field.

Findings

Global polarization and spin alignment depend on energy and particle species.

New local polarization results along the beam direction at the LHC.

Discussion of future measurements to understand local vorticity fields.

Abstract

Recent experimental results on global polarization of hyperons and spin alignment of vector mesons in heavy-ion collisions are reviewed, especially in context of the energy dependence and particle species dependence. New results on local polarization along the beam direction at the LHC are discussed with previous measurements at RHIC. Future outlook of these measurements and possible future directions for better understanding of local vorticity field are briefly discussed.