IFLP   13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
artículos
Título:
Measurement of event-plane correlations in sqrt(s_NN)=2.76 TeV lead-lead collisions with the ATLAS detector
Autor/es:
ATLAS COLLABORATION, G. AAD, F. MONTICELLI, ET AL
Revista:
PHYS. REV. - C
Editorial:
AMER PHYSICAL SOC
Referencias:
Lugar: New York; Año: 2014 vol. 231 p. 1 - 23
ISSN:
0556-2813
Resumen:
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 bythe ATLAS experiment at the LHC. Fourteen correlators are measured using a standard event-planemethod and a scalar-product method, and the latter method is found to give a systematically largercorrelation signal. Several different trends in the centrality dependence of these correlators are ob-served. These trends are not reproduced by predictions based on the Glauber model, which includesonly 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, thecentrality dependence of the measured correlators. These observations suggest that both the fluctu-ations in the initial geometry and non-linear mixing between different harmonics in the final state areimportant for creating these correlations in momentum space.