<v2(pt)^2 v2^2>/<v2(pt)^2><v2^2> with etagap > 0.0 in centralities 0-5%, 5-10%, 10-20%, 20-30%, 30-40% and 40-50%

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

The flow magnitude decorrelation <v2(pTa)2 v22>/<v2(pTa)2><v22> with |\Delta\eta| > 0.0 in Pb-Pb collisions at \sqrt{s_{NN}} = 5.02 TeV 

Detail description

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

Using 4-particle correlations it is possible to probe the flow magnitude fluctuations separated from the flow angle fluctuations. The two effects are both presents when probing flow vector fluctuations with 2-particle correlations such as with v2{2}/v[2]. Any deviation from the pt-integrated baseline indicates the presence of pt-dependent flow magnitude fluctuations

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