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Measurement of event-plane correlations in √sNN = 2.76 TeV lead-lead collisions with the ATLAS detector
Journal article   Open access   Peer reviewed

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

María Josefina Alconada Verzini, Francisco Alonso, Xabier Sebastián Anduaga, María Teresa Dova, Fernando Gabriel Monticelli, Martín Fernando Tripiana and ATLAS Collaboration
Physical review. C, Nuclear physics, Vol.90(2), 024905
08/12/2014
DOI: 10.1103/PhysRevC.90.024905
url
https://doi.org/10.1103/PhysRevC.90.024905View
Published (Version of record) Open Access

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. La lista completa de autores que integran el documento puede consultarse en el archivo. Instituto de Física La Plata
 Ciencias Exactas Física

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