2004/08/19 by Thorsten Renk, Renk, Thorsten
Mathematics · Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Stochastic processes and statistical mechanics #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/0408218
6 pages, 5 figures, submitted to Phys. Lett. B
arxiv created 2004/08/19 · openalex publication_date 2004/08/19 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Using a model for the evolution of the fireball created in Au-Au collisions at full RHIC energy which reproduces the hadronic single particle spectra and two-particle correlations we calculate thermal photon emission from the hot partonic and hadronic matter. We present predictions for both the emitted photon transverse momentum spectrum and Hanbury-Brown Twiss (HBT) correlations. Surprisingly, we find that due to the strong transverse flow in the model photon emission from hadronic matter is sizeable in the momentum range expected to be dominated by thermal emission and that consequently the HBT radius parameters do not reflect exclusively properties of the partonic evolution phase. We compare to another model calculation where pre-equilibrium photon emission is dominant to illustrate the differences of both approaches.