Growth of Long Range Forward-Backward Multiplicity Correlations with Centrality in Au plus Au Collisions at root s(NN)=200 GeV

0338689 - ÚJF 2010 RIV US eng J - Journal Article
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Growth of Long Range Forward-Backward Multiplicity Correlations with Centrality in Au plus Au Collisions at root s(NN)=200 GeV.
Physical Review Letters. Roč. 103, č. 17 (2009), 172301/1-172301/6. ISSN 0031-9007. E-ISSN 1079-7114
R&D Projects: GA ČR GA202/07/0079; GA MŠMT LC07048
Institutional research plan: CEZ:AV0Z10480505; CEZ:AV0Z10100502
Keywords : GLUON DISTRIBUTION-FUNCTIONS * HEAVY-ION COLLISIONS * RAPIDITY CORRELATIONS
Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders
Impact factor: 7.328, year: 2009

Forward-backward multiplicity correlation strengths have been measured with the STAR detector for Au + Au and p + p collisions at root s(NN) = 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.
Permanent Link: http://hdl.handle.net/11104/0182402