Direct Photon Production in 158 A GeV 208Pb + 208Pb collisions
Nuclear Experiment
2007-05-23 v2
Abstract
A measurement of direct photon production in 208Pb + 208Pb collisions at 158 A GeV has been carried out in the CERN WA98 experiment. The invariant yield or upper limit of direct photons as a function of transverse momentum in the interval 0.5 < p_T < 4 GeV/c is presented. A significant direct photon excess is observed at p_T > 1.5 GeV/c in central collisions. The results are compared to proton-induced results and to theoretical predictions. Implications for the dynamics of high-energy heavy-ion collisions are discussed.
Keywords
Cite
@article{arxiv.nucl-ex/0006007,
title = {Direct Photon Production in 158 A GeV 208Pb + 208Pb collisions},
author = {WA98 Collaboration and M. M. Aggarwal},
journal= {arXiv preprint arXiv:nucl-ex/0006007},
year = {2007}
}
Comments
56 pages, 33 figures. Submitted to Phys. Rev. C