Photon Production from Nonequilibrium Disoriented Chiral Condensates in a Spherical Expansion

Details Photon Production from Nonequilibrium Disoriented Chiral Condensates in a Spherical Expansion Photon Production from Nonequilibrium Disoriented Chiral Condensates in a Spherical Expansion

2002-08-25

arxiv.org/abs/hep-ph/0208229v2

Phys.Lett. B548 (2002) 175-188

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, 3 figures

Scientific paper

10.1016/S0370-2693(02)02848-4

We study the production of photons through the non-equilibrium relaxation of a disoriented chiral condensate formed in the expanding hot central region in ultra-relativistic heavy-ion collisions. It is found that the expansion smoothes out the resonances in the process of parametric amplification such that the non-equilibrium photons are dominant to the thermal photons over the range 0.2-2 GeV. We propose that to search for non-equilibrium photons in the direct photon measurements of heavy-ion collisions can be a potential test of the formation of disoriented chiral condensates.

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