Λ polarization in very high energy heavy ion collisions as a probe of the quark-gluon plasma formation and properties polarization in very high energy heavy ion collisions as a probe of the quark-gluon plasma formation and properties

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F24%3A00377497" target="_blank" >RIV/68407700:21340/24:00377497 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1140/epjc/s10052-024-13229-z" target="_blank" >https://doi.org/10.1140/epjc/s10052-024-13229-z</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1140/epjc/s10052-024-13229-z" target="_blank" >10.1140/epjc/s10052-024-13229-z</a>

Result language
angličtina
Original language name
Λ polarization in very high energy heavy ion collisions as a probe of the quark-gluon plasma formation and properties polarization in very high energy heavy ion collisions as a probe of the quark-gluon plasma formation and properties
Original language description
We have studied the spin polarization of Lambda hyperons in heavy ion collisions at center-of-mass energies root sNN=200 GeV and root sNN=5.02 TeV carried out at RHIC and LHC colliders. We have calculated the mean spin vector at local thermodynamic equilibrium, including all known first-order terms in the gradients of the thermo-hydrodynamic fields, assuming that the hadronization hypersurface has a uniform temperature. We have also included the feed-down contributions to the polarization of Lambda stemming from the decays of polarized Sigma & lowast; and Sigma 0 hyperons. The obtained results are in good agreement with the data. In general, the component of the spin vector along the global angular momentum, orthogonal to the reaction plane, shows strong sensitivity to the initial longitudinal flow velocity. Furthermore, the longitudinal component of the spin vector turns out to be very sensitive to the bulk viscosity of the plasma at the highest LHC energy. Therefore, the azimuthal dependence of spin polarization can effectively constrain the initial hydrodynamic conditions and the transport coefficients of the quark gluon plasma.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10303 - Particles and field physics

Project
<a href="/en/project/GA22-25026S" target="_blank" >GA22-25026S: Matter in extreme conditions and relativistic heavy-ion collisions</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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