Publication:
On Ambiguity of Definition of Shear and Spin-Hall Contributions to Λ Polarization in Heavy-Ion Collisions

Дата
2022
Авторы
Ivanov, Y. B.
Soldatov, A. A.
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Научные группы
Организационные подразделения
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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.
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Аннотация
Recently proposed thermal-shear and spin-Hall contributions to the particle polarization in heavy-ion collisions are discussed. Alternative definitions of the thermal-shear contribution, i.e. those of Becattini–Buzzegoli–Palermo on the one hand and Liu–Yin on the other, are very similar in the midrapidity region while quite different at forward-backward rapidities, which are measured in fixed-target experiments. It is shown that the thermal-shear contribution to the global polarization with momentum averaging extended to all momenta is very different within these alternative definitions. The spin-Hall contribution to the global polarization, defined similarly to the Liu–Yin shear one, is identically zero, if averaging runs over all momenta. Only application of restrictive momentum acceptance and the boost (to Λ rest frame) correction result in nonzero global spin-Hall polarization. If the spin-Hall contribution were defined similarly to Becattini–Buzzegoli–Palermo shear one, the global spin-Hall polarization would be non-zero even without any acceptance and the boost correction. © 2022, Pleiades Publishing, Inc.
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Ivanov, Y. B. On Ambiguity of Definition of Shear and Spin-Hall Contributions to Λ Polarization in Heavy-Ion Collisions / Ivanov, Y.B., Soldatov, A.A. // JETP Letters. - 2022. - 10.1134/S0021364022601300
URI
https://www.doi.org/10.1134/S0021364022601300
 https://www.scopus.com/record/display.uri?eid=2-s2.0-85134764660&origin=resultslist
 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000829705000005
 https://openrepository.mephi.ru/handle/123456789/27408
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