Non-flow correlations and elliptic flow fluctuations in Au+Au collisions at [sqrt]sNN=200 GeV
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Alver-2010-Non-flow correlation.pdf
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Author(s)
Busza, Wit
Ballintijn, Maarten
Decowski, Michael P.
Gulbrandsen, K.
Henderson, C.
Kane, J. L.
Kulinich, Piotr
Li, W.
Reed, C.
Stephans, George S. F.
Alternative Title
Non-flow correlations and elliptic flow fluctuations in Au+Au collisions at √sNN=200 GeV
Date Issued
March 2010
Journal
Physical Review C
Publisher
American Physical Society
Citation
PHOBOS Collaboration et al. “Non-flow correlations and elliptic flow fluctuations in Au+Au collisions at [sqrt]sNN=200 GeV.” Physical Review C 81.3 (2010): 034915. © 2010 The American Physical Society.
Version
Final published version
Abstract
This article presents results on event-by-event elliptic flow fluctuations in Au+Au collisions at [sqrt]sNN= 200 GeV, where the contribution from non-flow correlations has been subtracted. An analysis method is introduced to measure non-flow correlations, relying on the assumption that non-flow correlations are most prominent at short ranges (|Δeta|<2). Assuming that non-flow correlations are of the order that is observed in p+p collisions for long-range correlations (|Δeta|>2), relative elliptic flow fluctuations of approximately 30–40% are observed. These results are consistent with predictions based on spatial fluctuations of the participating nucleons in the initial nuclear overlap region. It is found that the long-range non-flow correlations in Au+Au collisions would have to be more than an order of magnitude strongercompared to the p+p data to lead to the observed azimuthal anisotropy fluctuations with no intrinsic elliptic flow fluctuations.
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/PhysRevC.81.034915
