Observation of Scaled Correlation Signals which increase wirh Centrality of Au Au collisions at = 200 GeV
arXiv:nucl-ex/0702008 · doi:10.1142/S021830130700760X
Abstract
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 (azimuth) and (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/c4.0 GeV/c.
12 pages, 7 figures, Poster at 2006 International Quark Matter Conference in Shanghai China