Speaker
Description
Particle production in heavy-ion collisions exhibits a collective behaviour known as collective flow, which arises from the pressure-driven expansion of the quark-gluon plasma (QGP) formed in these collisions.
The second-order Fourier coefficient of a series expansion of the azimuthal distribution of final-state particles is known as elliptic flow ($v_2$). A non-zero $v_2$ can lead to the formation of local vorticities in the QGP along the beam axis, which, via spin-orbit coupling, are expected to induce a longitudinal component in the polarization of hadrons.
The $v_2$ and the polarization provide valuable insights into the early dynamics of heavy-ion collisions and the properties of the QGP, such as its shear and bulk viscosities.
This poster presents the measurement of the elliptic flow of $\Xi$ hyperons across different centrality classes and transverse-momentum intervals with unprecedented precision, using a high-statistics sample of Run 3 Pb-Pb collisions at $\sqrt{s_\mathrm{NN}}=5.36$ TeV collected by the ALICE experiment. Additionally, the first measurement of $\Xi$ longitudinal polarization at the LHC energies is presented.
| Category | Experiment |
|---|---|
| Collaboration (if applicable) | ALICE collaboration |
