Measurement of event-plane correlations in √sNN = 2.76 TeV lead-lead collisions with the ATLAS detector

ATLAS Collaboration

Research output: Contribution to journalArticlepeer-review

Abstract

A measurement of event-plane correlations involving two or three event planes of different order is presented as a function of centrality for 7 μb-1 Pb+Pb collision data at sNN=2.76 TeV, recorded by the ATLAS experiment at the Large Hadron Collider. Fourteen correlators are measured using a standard event-plane method and a scalar-product method, and the latter method is found to give a systematically larger correlation signal. Several different trends in the centrality dependence of these correlators are observed. These trends are not reproduced by predictions based on the Glauber model, which includes only the correlations from the collision geometry in the initial state. Calculations that include the final-state collective dynamics are able to describe qualitatively, and in some cases also quantitatively, the centrality dependence of the measured correlators. These observations suggest that both the fluctuations in the initial geometry and the nonlinear mixing between different harmonics in the final state are important for creating these correlations in momentum space.

Original languageEnglish
Article number024905
JournalPhysical Review C - Nuclear Physics
Volume90
Issue number2
DOIs
StatePublished - 12 Aug 2014

Funding

FundersFunder number
National Science Foundation1119200, 1305037
National Science Foundation
Seventh Framework Programme246806
Seventh Framework Programme
Science and Technology Facilities CouncilPP/E002757/1, PP/E000347/1, ST/H001069/2, ST/L001195/1, ST/J00474X/1, ST/H001042/1, ST/H001042/2, ST/M002306/1, ST/J004928/1, ST/K001361/1, GRIDPP, ST/K001310/1, ST/L006464/1, ST/L00352X/1, ST/J501074/1, ST/L001144/1, ST/L003112/1, ST/J002798/1, ST/J005525/1, ST/K000659/1, ST/K001248/1, ST/L003325/1, ST/M000761/1, ST/I000178/1, ST/G50228X/1, ST/I505756/1, ST/H001093/2, ST/M001431/1, ST/K001418/1, ST/H001093/1, ST/M001512/1, ST/K001302/1, ST/K001388/1, ST/J500641/1, PP/E000487/1, ST/F007418/1, ST/K001329/1, ST/K000713/1, ST/K50208X/1, ST/L001179/1, ST/I005803/1, ST/J004944/1, ST/K501840/1, ST/H001026/1, ST/I006080/1, ST/I000186/1, ST/G502320/1, ST/K003437/1, ST/M001733/1, PP/D002915/1, ST/M000664/1, ST/H00100X/1, ST/L000970/1, ST/K00073X/1, ST/H00100X/2, ST/K000705/1, ST/L003511/1, ST/I005811/1, PP/E003087/1, ST/J005460/1, PP/E000355/1, ST/K00140X/1, ST/M001474/1, ST/F00754X/1, ST/I00372X/1, PP/E002846/1, ST/K003658/1, ST/H00095X/2, ST/J005487/1, ST/H00095X/1, ST/I006056/1, ST/M003213/1, PP/E000444/1, ST/K00137X/1, ST/H001026/2, ST/J005576/1
Science and Technology Facilities Council
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung149246
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung

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