Growth of Long Range Forward-Backward Multiplicity Correlations with Centrality in Au+Au Collisions at √sNN=200  GeV

Abelev, B. I. and Planinić, Mirko and Poljak, Nikola and Zuo, J. X. (STAR Collaboration) (2009) Growth of Long Range Forward-Backward Multiplicity Correlations with Centrality in Au+Au Collisions at √sNN=200  GeV. Physical Review Letters, 103 (17). pp. 172301-6. ISSN 0031-9007

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Abstract

Forward-backward multiplicity correlation strengths have been measured with the STAR detector for Au+Au and p+p collisions at √sNN=200  GeV. Strong short- and long-range correlations (LRC) are seen in central Au+Au collisions. The magnitude of these correlations decrease with decreasing centrality until only short-range correlations are observed in peripheral Au+Au collisions. Both the dual parton model (DPM) and the color glass condensate (CGC) predict the existence of the long-range correlations. In the DPM, the fluctuation in the number of elementary (parton) inelastic collisions produces the LRC. In the CGC, longitudinal color flux tubes generate the LRC. The data are in qualitative agreement with the predictions of the DPM and indicate the presence of multiple parton interactions.

Item Type: Article
Keywords: multiplicity, correlation, centrality
Date: October 2009
Subjects: NATURAL SCIENCES > Physics
Additional Information: Copyright (2009) by the American Physical Society.
Divisions: Faculty of Science > Department of Physics
Project code: 119-0982887-1006
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 10 Jun 2014 10:35
Last Modified: 10 Jun 2014 10:35
URI: http://digre.pmf.unizg.hr/id/eprint/2327

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