August 28, 2022 to September 1, 2022
Serbian Academy of Sciences and Arts – SASA
Europe/Belgrade timezone

Shaping the quark-gluon plasma using measurements of anisotropic flow in Pb--Pb and Xe--Xe collisions with ALICE

Aug 30, 2022, 2:00 PM
Hall 661 (Faculty of Physics)

Hall 661

Faculty of Physics

Board: S05-HEP-111
Oral presentation S05 High Energy Physics (Particles and Fields) S05 High Energy Physics (Particles and Fields)


Catalin Ristea (Institute of Space Science, Bucharest, Romania)


Measurements of azimuthal anisotropic flow provide valuable information on the properties of the quark-gluon plasma created in relativistic collisions of heavy ions. In addition, strong fluctuations of the anisotropic flow allow for an efficient selection of the events corresponding to a specific initial geometry. This selection technique, Event Shape Engineering, has been used to measure the elliptic and triangular flow of inclusive and identified particles ($\pi$, K, p, ${\rm K}^{\rm 0}_{\rm S}$, $\Lambda$, $\Xi$) in Pb--Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV recorded by the ALICE detector. The measurements are reported for a wide range of particle transverse momenta, $p_{\rm T}$, within the pseudorapidity region $|\eta|<0.8$. The effect of the event-shape selection is within uncertainties independent of particle species up to $p_{\rm T} \sim 8$ GeV/$c$, and the origin of this observation is discussed. Strong constraints on the initial conditions of a collision and hydrodynamic medium response are placed comparing these results to those from Xe--Xe collisions at $\sqrt{s_{\rm NN}} = 5.44$ TeV.

Primary authors

Catalin Ristea (Institute of Space Science, Bucharest, Romania) for the ALICE Collaboration

Presentation materials