High-pT Direct-Photon Results from PHENIX
Abstract
Direct-photon measurements in p+p and Au+Au collisions at sqrt{s_{NN}} = 200 GeV from the PHENIX experiment are presented. The p+p results are found to be in good agreement with next-to-leading-order (NLO) perturbative QCD calculations. Direct-photon yields in Au+Au collisions scale with the number of inelastic nucleon-nucleon collisions and don't exhibit the strong suppression observed for charged hadrons and neutral pions. This observation is consistent with models which attribute the suppression of high-pT hadrons to energy loss of quarks and gluons in the hot and dense medium produced in Au+Au collisions at RHIC.
Cite
@article{arxiv.hep-ex/0512015,
title = {High-pT Direct-Photon Results from PHENIX},
author = {Klaus Reygers},
journal= {arXiv preprint arXiv:hep-ex/0512015},
year = {2019}
}
Comments
5 pages, 3 figures, to be published in the proceedings of the PHOTON2005 International Conference on the Structure and Interactions of the Photon, Warsaw, Aug. 31 - Sep. 4, 2005