Vortex rings from high energy central p+A collisions
Abstract
Relativistic p+A collisions may produce droplets of quark gluon plasma (QGP) that quickly develop a toroidal vortex structure similar to that of an expanding smoke ring. We present viscous relativistic hydrodynamic calculations of ultra-central p+A collisions and develop an experimental observable to probe the structure, correlating the polarization and momentum of hyperons emitted from the collision. The effect is robust against changes in the definition of vorticity used to calculate the polarization. Experiments at RHIC and LHC may test the existence and strength of the vortex toroids, bringing new evidence to bear on the question of collectivity in the smallest QGP droplets.
Cite
@article{arxiv.2101.10872,
title = {Vortex rings from high energy central p+A collisions},
author = {Michael Annan Lisa and João Guilherme Prado Barbon and David Dobrigkeit Chinellato and Willian Matioli Serenone and Chun Shen and Jun Takahashi and Giorgio Torrieri},
journal= {arXiv preprint arXiv:2101.10872},
year = {2021}
}
Comments
5 pages, 4 figures; For v2, references updated; v3 is as published: emphasized that the effect is the same regardless of the "type" of vorticity used in the calculation