Elsevier

Physics Letters B

Volume 319, Issue 4, 30 December 1993, Pages 520-525
Physics Letters B

Soft photon production in a hot hadronic medium

https://doi.org/10.1016/0370-2693(93)91760-KGet rights and content

Abstract

We discuss the emissivity of a thermalized hadronic medium in the soft real-photon region. The contribution due to the bremsstrahlung is calculated and compared with hadron-hadron scattering and hadronic decays. The Landau-Pomeranchuk suppression of photon production is included in our analyses. It is argued that the bremsstrahlung is a dominant source of soft photons with energy ω≲0.8 GeV. The main contribution of more energetic photons in a hot hadronic medium is the reaction πϱA1πγ. The photon production rate due to bremsstrahlung in the quark-gluon plasma is also calculated and compared with the hadronic gas contribution.

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