Is different $\Lambda$ and $\bar{\Lambda}$ polarization caused by different spatio-temporal freeze-out picture?статьяИсследовательская статья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 29 апреля 2020 г.
Аннотация:Thermal vorticity in non-central Au+Au collisions at energies $7.7 \leq \sqrt{s} \leq 62.4$~GeV is calculated within the UrQMD transportmodel. Tracing the $\Lambda$ and $\bar{\Lambda}$ hyperons back to theirlast interaction point we were able to obtain the temperature and thechemical potentials at the time of emission by fitting the extractedbulk characteristics of hot and dense medium to statistical model ofideal hadron gas. Then the polarization of both hyperons was calculated.The polarization of $\Lambda$ and $\bar{\Lambda}$ increases withdecreasing energy of nuclear collisions. The stronger polarization of$\bar{\Lambda}$ is explained by the different space-time distributionsof $\Lambda$ and $\bar{\Lambda}$ and by different freeze-out conditionsof both hyperons.