Köln 2025 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 57: Heavy-Ion Collisions and QCD Phases IX

HK 57.4: Talk

Thursday, March 13, 2025, 18:30–18:45, HS 3 Chemie

Event-by-event multiharmonic correlations in Run 3 heavy-ion collisions with ALICE — •Ante Bilandzic for the ALICE Germany collaboration — Technical University of Munich

In ultrarelativistic heavy-ion collisions, several nontrivial physics phenomena can lead to persistent event-by-event azimuthal anisotropies in particle distributions, which are traditionally quantified with Fourier harmonics. Besides the standard measurements of individual vn harmonics, further independent information about different stages in heavy-ion collisions can be extracted from multi-harmonic 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. This contribution presents the first differential measurements of SC and AC observables in Run 3 Pb-Pb collisions as a function of kinematic variables.

Keywords: collective phenomena; multiharmonic correlations