A Systematic Study on Direct Photon Production from Central Heavy Ion Collisions
High Energy Physics - Phenomenology
2009-02-02 v2
Abstract
We investigate the production of direct photons in central Au-Au collisions at the relativistic Heavy-Ion Collider (RHIC) at 200 GeV per nucleon, considering all possible sources. We treat thermal photons emitted from a quark-gluon plasma and from a hadron gas, based on a realistic thermodynamic expansion. Hard photons from elementary nucleon-nucleon scatterings are included: primordial elementary scatterings are certainly dominant at large transverse momenta, but also secondary photons from jet fragmentation and jet-photon conversion cannot be ignored. In both cases we study the effect of energy loss, and we also consider photons emitted from bremsstrahlung gluons via fragmentation.
Cite
@article{arxiv.0712.3619,
title = {A Systematic Study on Direct Photon Production from Central Heavy Ion Collisions},
author = {Fu-Ming Liu and Klaus Werner},
journal= {arXiv preprint arXiv:0712.3619},
year = {2009}
}
Comments
13 pages 19 figures