Growth of long range forward-backward multiplicity correlations with centrality in Au+Au collisions at {radical}[ovr s}{sub NN} = 200 GeV.
Forward-backward multiplicity correlation strengths have been measured with the STAR detector for Au+Au and p+p collisions at {radical}s{sub 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.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC); National Science Foundation (NSF); Sloan Foundation; EPSRC United Kingdom
- DOE Contract Number:
- DE-AC02-06CH11357
- OSTI ID:
- 986301
- Report Number(s):
- ANL-HEP-PR-10-26; TRN: US1006260
- Journal Information:
- Phys. Rev. Lett., Vol. 103, Issue Oct. 23, 2009
- Country of Publication:
- United States
- Language:
- ENGLISH
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