Two- and three-particle azimuthal correlations of high-pt charged hadrons in Pb-Au collisions at 158A GeV/c

Abstract

Azimuthal correlations of hadrons with high transverse momenta serve as a measure to study the energy loss and the fragmentation pattern of jets emerging from hard parton-parton interactions in heavy ion collisions. Preliminary results from the CERES experiment on two- and three-particle correlations in central Pb-Au collisions are presented. A strongly non-Gaussian shape on the away-side of the two-particle correlation function is observed, indicating significant interactions of the emerging partons with the medium. Mechanisms like deflection of the initial partons or the evolution of a mach cone in the medium can lead to similar modifications of the jet structure on the away-side. An analysis based on three-particle correlations is presented which helps to shed light on the origin of the observed away-side pattern.

4 pages, 2 figures, contribution to the Quark Matter conference 2006

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Cited by in corpus (5)

• Transverse Radial Flow Effects on Two- and Three-Particle Angular Correlations
• Scale-dependence of transverse momentum correlations in Pb-Au collisions at 158A GeV/c
• Three-particle cumulant Study of Conical Emission
• Quark Matter 2006: high-pT and jets
• A Four Component Picture for Jet Induced Correlations in Heavy Ion Collisions?