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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10303 - Particles and field physics

Projekt

<a href="/cs/project/GA22-25026S" target="_blank" >GA22-25026S: Hmota v extrémních podmínkách a relativistické srážky těžkých iontů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

European Physical Journal C

ISSN

1434-6044

e-ISSN

1434-6052

Svazek periodika

84

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

14

Strana od-do

—

Kód UT WoS článku

001310609300002

EID výsledku v databázi Scopus

2-s2.0-85203592011