Non-flow correlations and elliptic flow fluctuations in Au+Au collisions at [sqrt]sNN=200 GeV
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 cor...
| Main Authors: | , , , , , , , , , , , , , , , , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
American Physical Society
2010
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| Online Access: | http://hdl.handle.net/1721.1/57494 https://orcid.org/0000-0002-3831-9071 https://orcid.org/0000-0003-3106-4894 https://orcid.org/0000-0001-8983-2169 https://orcid.org/0000-0003-3681-0649 https://orcid.org/0000-0002-4918-5128 |
| Summary: | 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. |
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