The 8th International Conference on Chirality, Vorticity and Magnetic Field in Quantum Matter

Hyperon polarization along the beam direction in pPb collision at CMS (online)

24 juil. 2024, 11:30

30m

Amphitheater A11 (West University of Timisoara)

On-line talk Hyperons

Orateur

Chenyan Li (Shandong University)

Description

The observation of hyperon polarization along beam direction ($P_z$) in nucleus-nucleus collisions has opened a new way to study the complex vortical structures of the QGP. With the high-statistics data collected by the CMS experiment, we present the first $P_z$ results for $\mathrm{\Lambda }$ and $\overline{\mathrm{\Lambda }}$ particles in pPb collision at $\sqrt{s_{NN}}=8.16$ TeV over a wide transverse momentum and multiplicity range. The measured $P_z$ signal can shed light on the origin of collectivity in small collision systems as well as the mechanism of spin polarization in heavy ion collisions.

Documents de présentation

Chirality_2024_chenyan_v3.pdf