Direct-Photon Production in Au+Au Collisions at RHIC

Details Direct-Photon Production in Au+Au Collisions at RHIC Direct-Photon Production in Au+Au Collisions at RHIC

2006-08-24

arxiv.org/abs/nucl-ex/0608043v1

AIPConf.Proc.870:736-740,2006

Physics

Nuclear Physics

Nuclear Experiment

5 pages, 3 figures, to appear in the proceedings of the 9th Conference on the Intersections of Particle and Nuclear Physics (C

Scientific paper

10.1063/1.2402742

Results from the PHENIX experiment on direct-photon production in Au+Au collisions at sqrt{s_{NN}} = 200 GeV for transverse momenta 1 < p_T < 13 GeV/c are presented. Direct-photon yields at high p_T scale as expected for particle production in hard processes. This supports jet-quenching models which attribute the suppression of high-p_T hadrons to the energy loss of fast partons in the quark-gluon plasma. The low-p_T direct-photon spectra, measured via e+e- pairs with small invariant masses, are possibly related to the production of thermal direct photons in Au+Au collisions at RHIC.

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