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  • Letter
  • Open Access

Vortex rings from high energy central p+A collisions

Michael Annan Lisa1, João Guilherme Prado Barbon2, David Dobrigkeit Chinellato2, Willian Matioli Serenone2, Chun Shen3,4, Jun Takahashi2, and Giorgio Torrieri2

  • 1The Ohio State University, Columbus, Ohio 43210, USA
  • 2Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas, Campinas, Brasil
  • 3Department of Physics and Astronomy, Wayne State University, Detroit, Michigan 48201, USA
  • 4RIKEN BNL Research Center, Brookhaven National Laboratory, Upton, New York 11973, USA

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Phys. Rev. C 104, L011901 – Published 6 July, 2021

DOI: https://doi.org/10.1103/PhysRevC.104.L011901

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 ultracentral p+A collisions and develop an experimental observable to probe the structure, correlating the polarization and momentum of hyperons emitted from the collision. This effect is robust against changes in the definition of vorticity used to calculate the polarization. Experiments at the Brookhaven National Laboratory Relativistic Heavy Ion Collider and the CERN Large Hadron Collider 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.

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Information

Phys. Rev. C 104, L011901– Published 6 July, 2021
  • Received 30 January 2021
  • Revised 19 April 2021
  • Accepted 4 June 2021
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