Direct photon-charged hadron azimuthal correlations

Abstract

Azimuthal correlations of direct photons at high transverse energy (8 $<$ E${}_T$ $<$ 16 GeV) with away-side hadrons of transverse momentum (3 $<$ p${}_T$ $<$ 6 GeV/c) have been measured over a broad range of centrality for $Au+Au$ collisions and $p+p$ collisions at $\sqrt{s_{NN}}$ = 200 GeV. The presented results are the first measurements at RHIC for $\gamma$-hadron azimuthal correlations in $Au+Au$ collisions.

4 pages, 3 figures

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• STAR results on medium properties and response of the medium to energetic partons
• Photon Production in Hot and Dense Strongly Interacting Matter
• Gamma-Jet Tomography of Quark-Gluon Plasma in High-Energy Nuclear Collisions
• Direct photons ~basis for characterizing heavy ion collisions~
• Jet energy loss and high $p_T$ photon production in hot quark-gluon plasma