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A Systematic Study on Direct Photon Production from Central Heavy Ion Collisions
Liu F.-M., Werner K.
Journal of Physics G: Nuclear and Particle Physics 36 (2009) 035101 - http://hal.in2p3.fr/in2p3-00216073
Physique/Physique des Hautes Energies - Phénoménologie
A Systematic Study on Direct Photon Production from Central Heavy Ion Collisions
Fu-Ming Liu, Klaus Werner1
1 :  SUBATECH - Laboratoire SUBATECH Nantes
http://www-subatech.in2p3.fr/
CNRS : UMR6457 – IN2P3 – Université de Nantes – École Nationale Supérieure des Mines - Nantes
4, rue Alfred Kastler - 44070 Nantes Cedex 03
France
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.

Articles dans des revues avec comité de lecture
2009
Journal of Physics G: Nuclear and Particle Physics (J. Phys. G: Nucl. Part. Phys.)
Publisher Institute of Physics: Hybrid Open Access
ISSN 0954-3899 (eISSN : 1361-6471)
36
035101

13 pages 19 figures
Lien vers le texte intégral : 
http://fr.arXiv.org/abs/0712.3619