Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2007-04-02
Int.J.Mod.Phys.E16:3123-3130,2008
Physics
Nuclear Physics
Nuclear Experiment
Talk given at IWCF 2006, Hangzhou, China. 8 Pages, 8 Figures
Scientific paper
10.1142/S0218301307009117
Two-particle correlations have shown modification to the away-side shape in central Au+Au collisions relative to $pp$, d+Au and peripheral Au+Au collisions. Different scenarios can explain this modification including: large angle gluon radiation, jets deflected by transverse flow, path length dependent energy loss, Cerenkov gluon radiation of fast moving particles, and conical flow generated by hydrodynamic Mach-cone shock-waves. Three-particle correlations have the power to distinguish the scenarios with conical emission, conical flow and Cerenkov radiation, from other scenarios. In addition, the dependence of the observed shapes on the $p_T$ of the associated particles can be used to distinguish conical emission from a sonic boom (Mach-cone) and from QCD-Cerenkov radiation. We present results from STAR on 3-particle azimuthal correlations for a high $p_T$ trigger particle with two softer particles. Results are shown for $pp$, d+Au and high statistics Au+Au collisions at $\sqrt{s_{NN}}$=200 GeV. An important aspect of the analysis is the subtraction of combinatorial backgrounds. Systematic uncertainties due to this subtraction and the flow harmonics v2 and v4 are investigated in detail. The implications of the results for the presence or absence of conical flow from Mach-cones are discussed.
No associations
LandOfFree
Three Particle Correlations from STAR does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Three Particle Correlations from STAR, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Three Particle Correlations from STAR will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-492432