Aller au contenu principal
Accès ouvert déclaré 2026 article

Hyperon ($\Lambda$) polarization along the beam axis in Pb$-$Pb collisions at $\mathbf{\sqrt{s_{\mathrm{NN}}}=5.36}$ TeV

0Citations signalées, ce qui n’est pas une note de qualité
0Institutions déclarées
0Pays d’affiliation déclarés

Le résumé fourni par la source

The measurement of hyperon ($\Lambda$ and $\overline{\Lambda}$) polarization along the beam axis in Pb$-$Pb collisions at $\sqrt{s_{\mathrm{NN}}} = 5.36$ TeV using the ALICE detector is presented. The polarization, arising from vorticity components induced by anisotropic flow, is studied relative to the second- and third-order event planes. The measured polarization exhibits clear azimuthal sine modulations, providing the first observation of polarization along the beam direction measured relative to the third-order event plane at the Large Hadron Collider. The values of the polarization measured with respect to the second-order event plane relative to the second harmonic event plane are consistent with previous measurements at $\sqrt{s_{\mathrm{NN}}} = 5.02$ TeV and show improved statistical precision owing to the larger data sample. Comparisons with hydrodynamic calculations indicate that the measured polarization is sensitive to the bulk viscosity and the vortical structure of the quark--gluon plasma, offering new constraints on its transport properties. In particular, the polarization measured relative to the third-order event plane is expected to provide an additional and independent input to constrain both bulk and shear viscosities of the quark$-$gluon plasma.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.

Le contrôle bibliographique ouvert

Aucun DOI disponible pour le contrôle Crossref.

Les sujets associés

High-Energy Particle Collisions ResearchParticle physics theoretical and experimental studiesParticle Detector Development and Performance

BNTIC News n’est pas le producteur de ces données. Les publications sont interrogées à la demande dans Crossref, OpenAIRE, DOAJ, Europe PMC, HAL, DataCite, AfricArXiv, ROR et la Banque mondiale, sans clé d’accès. OpenAlex reste optionnel. Aucun service payant n’est nécessaire et aucune donnée externe n’est enregistrée en base. Consulter les sources et leurs limites.