Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2007-02-05
Int.J.Mod.Phys.E16:2149-2153,2007
Physics
Nuclear Physics
Nuclear Experiment
12 pages, 7 figures, Poster at 2006 International Quark Matter Conference in Shanghai China
Scientific paper
10.1142/S021830130700760X
We show the preliminary charged-particle pair correlation analyses presented in a poster session at the 2006 International Quark Matter Conference in Shanghai China. The correlation analysis space of $\Delta \phi$ (azimuth) and $\Delta \eta$ (pseudo-rapidity) are considered as a function of centrality for minimum bias Au + Au collisions in the mid-transverse momentum range in the STAR detector. The analyses involve unlike-sign charge pairs and like-sign charge pairs, which are transformed into charge-dependent (CD) signals and charge-independent (CI) signals. We use a multiplicity scale to compare the different centralities. We find the signals increase with increasing centrality. A model featuring dense gluonic hot spots as first proposed by van Hove predicts that the observables under investigation would have sensitivity to such a substructure should it occur. A blast wave model including multiple hot spots motivates the selection of transverse momenta in the range 0.8 GeV/c$ < p_t < $4.0 GeV/c.
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