Volume 398 - The European Physical Society Conference on High Energy Physics (EPS-HEP2021) - T05: Heavy Ion Physics
Polarization of $\lambda$-hyperons, vorticity and helicity structure in heavy-ion collisions
A. Zinchenko*, O. Teryaev, M. Baznat and A. Sorin
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Pre-published on: February 17, 2022
Published on: May 12, 2022
Abstract
Simulations of peripheral Au$+$Au collisions at NICA energies are performed in the PHSD transport model. The properties of velocity and vorticity fields as well as hydrodynamic helicity are studied at different impact parameters and energies. A general structure of the velocity field follows the little bang'' pattern which may be quantified by the velocity dependence allowing to extract the Hubble'' constant. A quadrupole-like structure of the vorticity field in all the planes is obtained. The helicity-separation effect is found. Calculations of the $\Lambda$-hyperon polarization is performed within the thermodynamic and anomalous models at NICA energies.
DOI: https://doi.org/10.22323/1.398.0308
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