Oleksandr Vitiuk
(Taras Shevchenko National University of Kyiv)
and polarization in heavy-ion collisions at BES RHIC energies is studied within the microscopic transport model UrQMD. We trace the formation and space-time evolution of vorticity and helicity patterns in details. This study demands a complex analysis of the fireball conditions including time slices, extraction of temperature and baryo- and strangeness chemical potentials, as well as freeze-out conditions of both hyperons. Rapidity and transverse momentum dependence of the polarization are obtained. We show that difference in global polarization of and at c.m. energies below 10 GeV can be explained by different space-time freeze-out conditions of two hyperons. Comparison with the STAR results shows a fair agreement between the model and the data.
Oleksandr Vitiuk
(Taras Shevchenko National University of Kyiv)
Larisa Bravina
(University of Oslo (NO))
Evgeny Zabrodin
(University of Oslo (NO))
Alexander Sorin
(Joint Institute for Nuclear Research (RU))
Oleg Teryaev
(JINR)
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