Measurement of Event Plane Correlations in Pb-Pb Collisions at $\sqrt{s_{\mathrm{NN}}}$=2.76 TeV with the ATLAS Detector

By J. Jia, for the Mpd Collaboration. 2012

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A measurement of correlations between event-plane angles @F_n is presented as a function of centrality for Pb-Pb collisions ant $\sqrt{s_{NN}}$=2.76TeV. These correlations are estimated from observed event-plane angles @J_n obtained from charged particle or transverse energy flow measured over a large pseudorapidity range |@h|<4.8, followed by a resolution correction that accounts for the dispersion of @J_n relative to @F_n. Various correlators involving two or three event planes with acceptable resolution are measured. Significant positive correlations are observed for 4(@F_2-@F_4),6(@F_2-@F_6),6(@F_3-@F_6),2@F_2+3@F_3-5@F_5,2@F_2+4@F_4-6@F_6 and -10@F_2+4@F_4+6@F_6. However, the measured correlations for 2@F_2+6@F_3+4@F_4 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.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/34ca7c40f30c5d298f9f9c0d8112cbad41fb9437