Publication: Global Lambda-hyperon polarization in Au plus Au collisions at root S-NN=3 GeV
Дата
2021
Авторы
Abdallah, M. S.
Aboona, B. E.
Adam, J.
Adamczyk, L.
Alekseev, I.
Brandin, A. V.
Khyzhniak, Y. V.
Kochenda, L.
Kravtsov, P.
Nigmatkulov, G.
Journal Title
Journal ISSN
Volume Title
Издатель
Аннотация
Global hyperon polarization, (P) over barH, in Au + Au collisions over a large range of collision energy, root S-NN, was recently measured and successfully reproduced by hydrodynamic and transport models with intense fluid vorticity of the quark-gluon plasma. While naive extrapolation of data trends suggests a large (P) over barH as the collision energy is reduced, the behavior of (P) over barH at small root S-NN < 7.7 GeV is unknown. Operating the STAR experiment in fixed-target mode, we measured the polarization of Lambda hyperons along the direction of global angular momentum in Au + Au collisions at root S-NN = 3 GeV. The observation of substantial polarization of 4.91 +/- 0.81(stat.) +/- 0.15(syst.)% in these collisions may require a reexamination of the viscosity of any fluid created in the collision, of the thermalization timescale of rotational modes, and of hadronic mechanisms to produce global polarization.
Описание
Ключевые слова
Цитирование
Global Lambda-hyperon polarization in Au plus Au collisions at root S-NN=3 GeV / Abdallah, MS [et al.] // Physical Review C. - 2021. - 104. - № 6. - 10.1103/PhysRevC.104.L061901
URI
https://www.doi.org/10.1103/PhysRevC.104.L061901
https://www.scopus.com/record/display.uri?eid=2-s2.0-85122576172&origin=resultslist
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000740280100002
https://openrepository.mephi.ru/handle/123456789/25211
https://www.scopus.com/record/display.uri?eid=2-s2.0-85122576172&origin=resultslist
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000740280100002
https://openrepository.mephi.ru/handle/123456789/25211