Viewpoint: Vector meson spin alignment by the strong force field

TL;DR

This paper discusses the large spin alignment of phi vector mesons observed in heavy-ion collisions, suggesting it reveals non-perturbative quark interactions influenced by fluctuating strong force fields.

Contribution

It introduces the potential link between meson spin alignment and non-perturbative strong force effects in hot quark matter.

Findings

Large global spin alignment observed in phi mesons

Indicates non-perturbative quark interactions in hot matter

Suggests influence of fluctuating strong force fields

Abstract

Observation of unexpectedly large global spin alignment of $\phi$ vector mesons in non-central heavy-ion collisions by STAR experiment may reveal the non-perturbative nature of quark interaction in hot matter through fluctuating strong force field with short correlation length.