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Isolation of Flow and Nonflow Correlations by Two- and Four-Particle Cumulant Measurements of Azimuthal Harmonics in √sNN = 200 GeV Au+Au Collisions

Abdelwahab, N. M. and Adamczyk, L. and Adkins, J. K. and Agakishiev, G. and Aggarwal, M. M. and Vértesi, Róbert (2015) Isolation of Flow and Nonflow Correlations by Two- and Four-Particle Cumulant Measurements of Azimuthal Harmonics in √sNN = 200 GeV Au+Au Collisions. PHYSICS LETTERS B, 745. pp. 40-47. ISSN 0370-2693

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Abstract

A data-driven method was applied to measurements of Au+Au collisions at √sNN = 200 GeV made with the STAR detector at RHIC to isolate pseu- dorapidity distance ∆η-dependent and ∆η-independent correlations by using two- and four-particle azimuthal cumulant measurements. We identified a component of the correlation that is ∆η-independent, which is likely dom- inated by anisotropic flow and flow fluctuations. It was also found to be independent of η within the measured range of pseudorapidity |η| < 1. The relative flow fluctuation was found to be 34%±2%(stat.)±3%(sys.) for parti- cles of transverse momentum pT less than 2 GeV/c. The ∆η-dependent part may be attributed to nonflow correlations, and is found to be 5% ± 2%(sys.) relative to the flow of the measured second harmonic cumulant at |∆η| > 0.7.

Item Type: Article
Uncontrolled Keywords: FLOW; Heavy-ion; Nonflow;
Subjects: Q Science / természettudomány > QC Physics / fizika
SWORD Depositor: MTMT SWORD
Depositing User: MTMT SWORD
Date Deposited: 25 Oct 2023 13:43
Last Modified: 25 Oct 2023 13:43
URI: http://real.mtak.hu/id/eprint/177796

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