New measures of longitudinal decorrelation of harmonic flow

Abstract

Harmonic flow in relativistic heavy-ion collisions is observed in a broad range of rapidities, and the flow at different rapidities is correlated. However, fluctuations lead to a small decorrelation of the harmonic flow magnitudes and flow angles at different rapidities. Using a hydrodynamic model with Glauber Monte Carlo initial conditions we show that the flow angle decorrelation strongly depends on the flow magnitude in the event. We propose observables to measure this effect in experiment.

arXiv commenttalk given at XXVIIth International Conference on Ultrarelativistic Nucleus-Nucleus Collision Quark Matter 2018

References in corpus (6)

• Evidence for transverse momentum and pseudorapidity dependent event plane fluctuations in PbPb and pPb collisions
• Torqued fireballs in relativistic heavy-ion collisions
• Measurement of longitudinal flow de-correlations in Pb+Pb collisions at $\sqrt{s_{\mathrm{NN}}}=2.76$ and 5.02 TeV with the ATLAS detector
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• A method for studying the rapidity fluctuation and decorrelation of harmonic flow in heavy-ion collisions
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Cited by in corpus (1)

• Application of Principal Component Analysis to establish proper basis for flow studies in heavy-ion collisions