Photon production in relativistic nuclear collisions at SPS and RHIC energies

Abstract

Chiral Lagrangians are used to compute the production rate of photons from the hadronic phase of relativistic nuclear collisions. Special attention is paid to the role of the pseudovector a_1 meson. Calculations that include reactions with strange mesons, hadronic form factors and vector spectral densities consistent with dilepton production, as well as the emission from a quark-gluon plasma and primordial nucleon-nucleon collisions, reproduce the photon spectra measured at the Super Proton Synchrotron (SPS). Predictions for the Relativistic Heavy Ion Collider (RHIC) are made.

arXiv commentWork presented at the 26th annual Montreal-Rochester-Syracuse-Toronto conference (MRST 2004) on high energy physics, Montreal, QC, Canada, 12-14 May 2004. 8 pages, 3 figures

References in corpus (6)

• Absence of Suppression in Particle Production at Large Transverse Momentum in sqrt(s_NN) = 200 GeV d+Au Collisions
• Low-Mass Dileptons at the CERN-SpS: Evidence for Chiral Restoration?
• Photon production through $A_1$ resonance in high energy heavy ion collisions
• Thermal Dilepton Radiation at Intermediate Masses at the CERN-SpS
• Dileptons in High-Energy Heavy-Ion Collisions
• Scaling of single photon production in hadronic collisions

Cited by in corpus (1)

• Electron-positron annihilation into four charged pions and the a_1-rho-pi Lagrangian