arXiv:0805.0622·v3·Nuclear Experiment
Indications of Conical Emission of Charged Hadrons at the BNL Relativistic Heavy Ion Collider
STAR Collaboration: B.I. Abelev · et al
Abstract
Three-particle azimuthal correlation measurements with a high transverse momentum trigger particle are reported for pp, d+Au, and Au+Au collisions at 200 GeV by the STAR experiment. Dijet structures are observed in pp, d+Au and peripheral Au+Au collisions. An additional structure is observed in central Au+Au data, signaling conical emission of correlated charged hadrons. The conical emission angle is found to be 1.37 +- 0.02(stat) +0.06-0.07(syst), independent of pt.
Comments: 7 pages, 4 figures, 1 table