Long range hadron density fluctuations at soft pT in Au+Au collisions at RHIC

Details Long range hadron density fluctuations at soft pT in Au+Au collisions at RHIC Long range hadron density fluctuations at soft pT in Au+Au collisions at RHIC

2002-11-16

arxiv.org/abs/nucl-ex/0211015v1

Physics

Nuclear Physics

Nuclear Experiment

10 pages, 5 figures, talk at the Xth International Wokshop on Multiparticle Production (Correlation and Flucutations in QCD),

Scientific paper

Dynamic fluctuations in the local density of non-identified hadron tracks reconstructed in the STAR TPC are studied using the discrete wavelet transform power spectrum technique which involves mixed event reference sample comparison. The two-dimensional event-by-event analysis is performed in pseudo-rapidity eta and azimuthal angle phi in bins of transverse momentum pT. HIJING simulations indicate that jets and mini-jets result in characteristic signals, visible already at soft pT, when the dynamic texture analysis is applied. In this analysis, the discrepancy between the experiment and the HIJING expectations for Au+Au at sqrt(S_NN)=200 GeV is most prominent in the central collisions where we observe the long range fluctuations to be enhanced at low pT, and suppressed above pT = 0.6 GeV.

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