<cos 4[Psi_2(p_T^a) - Psi_2(p_T^t)]> with etagap > 0.8 for various trigger particle pT in centrality 0-5%, 20-30% and 40-50%

Scope: PWG
PWG-CF (Flow and Correlations)
5.02 TeV
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Figure Caption

$\langle \cos 4[\Psi_2(p_T^a)-\Psi_2(p_T^t)]\rangle$ with $|\Delta\eta| > 0.8$ for different trigger particle $\textit{p}_T^t$ at $\sqrt{s_{NN}} = 5.02$ TeV. The errors bars correspond to statistical uncertainties while the shaded color bands correspond to systematic uncertainties.







Detail description

Keywords: Flow, Flow vector fluctuations, pT-dependent flow vector fluctuations, Pb-Pb collisions, 5.02 TeV

$\langle \cos 4[\Psi_2(p_T^a)-\Psi_2(p_T^t)]\rangle$ is a direct probe of flow angle fluctuations. The observable is obtained from the ratio of four-particle correlations.

Data sample: LHC15o

Events cuts: kInt7 trigger,  |Vz| < 10cm, V0M centrality estimator, Pileup cut

Track cuts: Filterbit 96, No. of TPC cluster > 70, NUA weights, Reference pT [0.2,5.0], |eta| < 0.8