Event-by-Event Fluctuations of Azimuthal Particle Anisotropy in Au+Au Collisions at [sqrt]sNN=200 GeV
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Alver-2010-Event-by-Event Fluct.pdf
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Author(s)
Busza, Wit
Alver, Burak Han
Ballintijn, Maarten
Decowski, Michael P.
Gulbrandsen, K.
Henderson, C.
Kane, J. L.
Kulinich, Piotr
Li, W.
Reed, C.
Alternative Title
Event-by-Event Fluctuations of Azimuthal Particle Anisotropy in Au+Au Collisions at √sNN=200 GeV
Date Issued
April 2010
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Alver, B. et al. “Event-by-Event Fluctuations of Azimuthal Particle Anisotropy in Au+Au Collisions at [sqrt]sNN=200 GeV.” Physical Review Letters 104.14 (2010): 142301. © 2010 The American Physical Society.
Version
Final published version
Abstract
This Letter presents the first measurement of event-by-event fluctuations of the elliptic flow parameter v2 in Au+Au collisions at [sqrt]sNN=200 GeV as a function of collision centrality. The relative nonstatistical fluctuations of the v2 parameter are found to be approximately 40%. The results, including contributions from event-by-event elliptic flow fluctuations and from azimuthal correlations that are unrelated to the reaction plane (nonflow correlations), establish an upper limit on the magnitude of underlying elliptic flow fluctuations. This limit is consistent with predictions based on spatial fluctuations of the participating nucleons in the initial nuclear overlap region. These results provide important constraints on models of the initial state and hydrodynamic evolution of relativistic heavy ion collisions.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.104.142301
