Two particle $\Delta\eta-\Delta\phi$ correlations in Au+Au Collisions at $\sqrt{S_{NN}}=200 GeV$ in the PHENIX experiment

ORAL

Abstract

We present the measurement of two dimensional inclusive photon - charged hadron two particle correlations in the PHENIX experiment. Jet-like correlations are modified in central Au+Au collisions, compared to p+p, in both the trigger and opposing jet. The trigger jet is elongated in pseudo-rapidity (the ``ridge''), while the opposing jet shows a double peak structure (``head'' and ``shoulder''). We decompose the structures by fitting the $\Delta\eta$ and $\Delta\phi$ correlations to disentangle contributions from the medium, the punch-through jet, and trigger jet. The trigger and opposing jet fragment spectra are compared to each other and to the ridge. The spectra of both ridge and shoulder are softer than that from hard scattering, but harder than the inclusive hadrons. The momentum flow between jet and medium is investigated using this decomposition technique.

Authors

  • Chin-Hao Chen

    Department of Physics and Astronomy, Stony Brook University