Strange hadron collectivity in pPb and PbPb collisions

Belyaev, A.V.; Boos, E.E.; Demiyanov, A.; Ershov, A.A.; Gribushin, A.; Kodolova, O.; Korotkikh, V.; Obraztsov, S.; Petrushanko, S.; Savrin, V.; Snigirev, A.; Vardanyan, I.; CMS, C.

Авторы: Belyaev A.V., Boos E.E., Demiyanov A., Ershov A.A., Gribushin A., Kodolova O., Korotkikh V., Obraztsov S., Petrushanko S., Savrin V., Snigirev A., Vardanyan I., CMS Collaboration
Журнал: Journal of High Energy Physics
Том: 2023
Номер: 05
Год издания: 2023
Издательство: IOP Publishing
Местоположение издательства: [Bristol, UK], England
Первая страница: 007
Номер статьи: 007
DOI: 10.1007/JHEP05(2023)007
Аннотация: The collective behavior of K0S and Λ/Λ¯¯¯¯ strange hadrons is studied by measuring the elliptic azimuthal anisotropy (v2) using the scalar-product and multiparticle correlation methods. Proton-lead (pPb) collisions at a nucleon-nucleon center-of-mass energy sNN−−−√ = 8.16 TeV and lead-lead (PbPb) collisions at sNN−−−√ = 5.02 TeV collected by the CMS experiment at the LHC are investigated. Nonflow effects in the pPb collisions are studied by using a subevent cumulant analysis and by excluding events where a jet with transverse momentum greater than 20 GeV is present. The strange hadron v2 values extracted in pPb collisions via the four- and six-particle correlation method are found to be nearly identical, suggesting the collective behavior. Comparisons of the pPb and PbPb results for both strange hadrons and charged particles illustrate how event-by-event flow fluctuations depend on the system size.
Добавил в систему: Петрушанко Сергей Владимирович

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Strange hadron collectivity in pPb and PbPb collisionsстатья

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