Hydrodynamic helicity and strange hyperon polarization in heavy-ion collisions

15th International Conference on Strangeness in Quark Matter

Baznat, M.^1,2 ; Gudima, K.^1,2 ; Sorin, A.^1,3 ; Teryaev, O.^1,3

Joint Institute for Nuclear Research, Dubna

141980, Russia^1

Institute of Applied Physics, Academy of Sciences of Moldova, Kishinev

MD-2028, Moldova^2

National Research Nuclear University (MEPhI), Moscow

115409, Russia^3

关键词: Atomic numbers;    Energy ranges;    Heavy ion collision;    Hydrodynamic helicity;    Hyperon polarization;    Reaction plane;    String models;    Vortical structures;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/668/1/012084/pdf
DOI  :  10.1088/1742-6596/668/1/012084

来源: IOP

【 摘 要 】

We study the P-odd effects related to the vorticity of the medium formed in noncentral heavy ion collisions. Using the kinetic Quark-Gluon String Model, we perform numerical simulations of the vorticity and hydrodynamical helicity for various atomic numbers, energies and centralities. We observe vortical structures typically occupying a relatively small fraction of the fireball volume. In the course of numerical simulations a noticeable hydrodynamic helicity was observed manifesting a specific mirror behaviour with respect to the reaction plane. The effect is maximal at the NICA and FAIR energy range.