Quark Matter 2025

Event-by-event multiharmonic vn correlations in heavy-ion collisions at sNN=5.36 TeV with ALICE

Not scheduled

20m

Goethe University Frankfurt, Campus Westend, Theodor-W.-Adorno-Platz 1, 60629 Frankfurt am Main, Germany

Poster Correlations & fluctuations Poster session 1

Speaker

Ante Bilandzic (Technische Universitaet Muenchen (DE))

Description

In ultrarelativistic heavy-ion collisions, several nontrivial physics phenomena (e.g. collective anisotropic flow, jet quenching, etc.) can lead to persistent event-by-event azimuthal anisotropies in particle distributions, which are traditionally quantified with Fourier harmonics $v_n$. Besides the conventional measurements of individual $v_n$ harmonics, further independent information about different stages in heavy-ion collisions can be extracted from multiharmonic $v_n$ correlations, using recently developed Symmetric Cumulants (SC) and Asymmetric Cumulants (AC). These novel observables are particularly suitable for Bayesian studies, after it was demonstrated that they exhibit a better sensitivity to model parameters than the previously used observables.

Of particular interest is a differential measurement of SC and AC observables as a function of transverse momentum $p_{\mathrm{T}}$, because this enables the separation of the contribution to $v_n$ harmonics from collective flow at low $p_{\mathrm{T}}$ and jet quenching at large $p_{\mathrm{T}}$.

This contribution presents the differential measurements of SC and AC observables in Run 3 Pb--Pb collisions at $\sqrt{s_{\mathrm{N}\mathrm{N}}}=5.36$~TeV as a function of kinematic variables. Dependence on collision energy is investigated as well by comparing results for SC and AC observables obtained from Pb--Pb collisions in Run 3 at $\sqrt{s_{\mathrm{N}\mathrm{N}}}=5.36$~TeV and Run 1 at $\sqrt{s_{\mathrm{N}\mathrm{N}}}=2.76$~TeV.

Presentation materials

Bilandzic_ALICE_QM25-v7.pdf