Speaker
Chenyan Li
(Shandong University (CN))
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 $\Lambda$ and $\bar{\Lambda}$ particles in pPb collision at $\sqrt{s_{NN}}= 8.16$ TeV over a wide transverse momentum ($p_{T}$) and multiplicity range. The measured $P_z$ signal has been found to increase towards lower multiplicity and higher $p_{T}$. Comparison with theoretical calculations will be discussed. These results can shed light on the mechanism and theoretical implementation of spin polarization in heavy ion collisions.
| Category | Experiment |
|---|---|
| Collaboration (if applicable) | CMS |
Author
Chenyan Li
(Shandong University (CN))
