Measurement of Event Plane Correlations in Pb–Pb Collisions at image with the ATLAS Detector

A measurement of correlations between event-plane angles image is presented as a function of centrality for Pb–Pb collisions ant image. These correlations are estimated from observed event-plane angles image obtained from charged particle or transverse energy flow measured over a large pseudorapidity range image, followed by a resolution correction that accounts for the dispersion of image relative to image. Various correlators involving two or three event planes with acceptable resolution are measured. Significant positive correlations are observed for image and image. However, the measured correlations for image are negative. These results may shed light on the patterns of the fluctuation of the created matter in the initial state as well as the subsequent hydrodynamic evolution.