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Longitudinal spin polarization in a thermal model


Longitudinal spin polarization in a thermal model

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dc.contributor.author Florkowski, Wojciech [SAP14004784] pl
dc.contributor.author Kumar, Avdhesh pl
dc.contributor.author Mazeliauskas, Aleksas pl
dc.contributor.author Ryblewski, Radoslaw pl
dc.date.accessioned 2019-12-03T08:48:49Z
dc.date.available 2019-12-03T08:48:49Z
dc.date.issued 2019 pl
dc.identifier.issn 2469-9985 pl
dc.identifier.uri https://ruj.uj.edu.pl/xmlui/handle/item/88442
dc.language eng pl
dc.rights Udzielam licencji. Uznanie autorstwa 4.0 Międzynarodowa *
dc.rights.uri http://creativecommons.org/licenses/by/4.0/pl/legalcode *
dc.title Longitudinal spin polarization in a thermal model pl
dc.type JournalArticle pl
dc.abstract.en We use a thermal model with single freeze-out to determine longitudinal polarization of $\Lambda$ hyperons emitted from a hot and rotating hadronic medium. We consider the top RHIC energies and use the model parameters determined in the previous analyses of particle spectra and elliptic flow. Using a direct connection between the spin polarization tensor and thermal vorticity, we reproduce earlier results which indicate a quadrupole structure of the longitudinal component of the polarization three-vector with an opposite sign compared to that found in the experiment. We further use only the spatial components of the thermal vorticity in the laboratory system to define polarization and show that this leads to the correct sign and magnitude of the quadrupole structure. This procedure resembles a non-relativistic connection between the polarization three-vector and vorticity employed in other works. In general, our results bring further evidence that the spin polarization dynamics in heavy-ion collisions may be not directly related to the thermal vorticity. The additional material explains the construction of the hydrodynamically consistent gradients of fluid velocity and temperature in thermal models with the help of the perfect-fluid equations of motion. pl
dc.description.volume 100 pl
dc.description.number 5 pl
dc.identifier.doi 10.1103/PhysRevC.100.054907 pl
dc.identifier.eissn 2469-9993 pl
dc.title.journal Physical Review. C pl
dc.language.container eng pl
dc.affiliation Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki im. Mariana Smoluchowskiego pl
dc.subtype Article pl
dc.identifier.articleid 054907 pl
dc.rights.original CC-BY; inne; ostateczna wersja wydawcy; w momencie opublikowania; 0 pl
dc.identifier.project ROD UJ / OP pl
.pointsMNiSW [2019 A]: 140

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Udzielam licencji. Uznanie autorstwa 4.0 Międzynarodowa Except where otherwise noted, this item's license is described as Udzielam licencji. Uznanie autorstwa 4.0 Międzynarodowa