Publication:
Correlation between global polarization, angular momentum, and flow in heavy-ion collisions

Дата
2020
Авторы
Ivanov, Y. B.
Soldatov, A. A.
Journal Title
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Volume Title
Издатель
Научные группы
Организационные подразделения
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Организационная единица
Институт ядерной физики и технологий
Цель ИЯФиТ и стратегия развития - создание и развитие научно-образовательного центра мирового уровня в области ядерной физики и технологий, радиационного материаловедения, физики элементарных частиц, астрофизики и космофизики.
Выпуск журнала
Аннотация
Possible correlations of the global polarization of A hyperons with angular momentum and transverse flow in the central region of colliding nuclei are studied based on a refined estimate of the global polarization. Simulations of Au + Au collisions at collision energies root s(NN )= 6-40 GeV are performed within the model of the three-fluid dynamics. Within the crossover and first-order-phase-transition scenarios this refined estimate quite satisfactorily reproduces the experimental STAR data. Hadronic scenario fails at high collision energies, root s(NN ) > 10 GeV, and even predicts the opposite sign of the global polarization. It is found that the global polarization correlates with neither the angular momentum accumulated in the central region nor with directed and elliptic flow. At the same time we observed correlation between the angular momentum and directed flow in both their time and collision-energy dependence. These results suggest that, although initially the angular momentum is the driving force for the vortex generation, later the angular momentum and vortex motion become decorrelated in the midrapidity region. Then the midrapidity angular momentum is determined by the pattern of the directed flow and even becomes negative when the antiflow occurs. At the freeze-out stage, the dominant part of the participant angular momentum is accumulated in the fragmentation regions.
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Цитирование
Ivanov, Y. B. Correlation between global polarization, angular momentum, and flow in heavy-ion collisions / Ivanov, YB, Soldatov, AA // Physical Review C. - 2020. - 102. - № 2. - 10.1103/PhysRevC.102.024916
URI
https://www.doi.org/10.1103/PhysRevC.102.024916
 https://www.scopus.com/record/display.uri?eid=2-s2.0-85093107331&origin=resultslist
 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000565706700003
 https://openrepository.mephi.ru/handle/123456789/22322
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