Publication:
Λ Polarization and Vortex Rings in Heavy-Ion Collisions at NICA Energies

Файлы
W4319438950.pdf(1.69 MB)
Дата
2023
Авторы
Ivanov, Y. B.
Soldatov, A. A.
Journal Title
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Volume Title
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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
We review recent studies of vortical motion and the resulting polarization of Λ hyperons in heavy-ion collisions at NICA energies, in particular, within the model of three-fluid dynamics (3FD). This includes predictions of the global Λ polarization and ring structures that appear in Au+Au collisions. The global Λ polarization in Au+Au collisions is calculated, including its rapidity and centrality dependence. The contributions of the thermal vorticity and meson-field term (proposed by Csernai, Kapusta, and Welle) to the global polarization are considered. The results are compared with data from recent STAR and HADES experiments. It is predicted that the polarization maximum is reached at sNN≈ 3 GeV if the measurements are performed with the same acceptance. It is demonstrated that a pair of vortex rings are formed, one at forward rapidities and another at backward rapidities, in ultra-central Au+Au collisions at sNNandgt; 4 GeV. The vortex rings carry information about the early stage of the collision, in particular, the stopping of baryons. It is shown that these rings can be detected by measuring the ring observable RΛ, even in the midrapidity region at sNN= 5–20 GeV. At forward/backward rapidities, the RΛ signal is expected to be stronger. The possibility of observing the vortex-ring signal against the background of non-collective transverse polarization is discussed.
Описание
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Цитирование
Ivanov, Y. B. Λ Polarization and Vortex Rings in Heavy-Ion Collisions at NICA Energies / Ivanov, Y. B., Soldatov, A. A. // Particles. - 2023. - 6. - № 1. - P. 245-261. - 10.3390/particles6010014
URI
https://www.doi.org/10.3390/particles6010014
 https://www.scopus.com/record/display.uri?eid=2-s2.0-85151071125&origin=resultslist
 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000960517800001
 https://openrepository.mephi.ru/handle/123456789/30053
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