The VII-th International Conference on the Initial Stages of High-Energy Nuclear Collisions : Initial Stages 2023

Unbiased symmetry plane correlations in Pb--Pb collisions with ALICE

Not scheduled

2h

Københavns Universitetsbibliotek Nord

Poster Collective dynamics from small to large systems Reception and poster session

Speaker

Maxim Mikael Olavi Virta (University of Jyväskylä)

Description

Measurements of correlations between different symmetry planes in ultrarelativistic heavy-ion collisions probe the initial state and non-linear hydrodynamic response of the medium to initial anisotropies. Earlier studies on symmetry plane correlations (SPC) were conducted by using the Scalar Product method. However, this method is biased by the presence of correlations between different flow amplitudes.

In this talk, we present the first studies of SPC using a new unbiased estimator, the Gaussian estimator (GE), in Pb-Pb collisions at $\sqrt{s_{\mathrm {NN}}}$ = 2.76 and 5.02 TeV. The comparison between the two sets of results allows a better understanding of energy dependence. Due to the increase in available data, higher precision measurements have been obtained in addition to many new higher-order SPC, which were previously not accessible. All of the results are compared with state-of-the-art model calculations.