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Soft Photon Production Rate in Resummed Perturbation Theory of High Temperature QCD

R. Baier·S. Peigné·D. Schiff
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Abstract

We calculate the production rate of soft real photons from a hot quark -- gluon plasma using Braaten -- Pisarski's perturbative resummation method. To leading order in the QCD coupling constant $g$ we find a logarithmically divergent result for photon energies of order $gT$, where $T$ is the plasma temperature. This divergent behaviour is due to unscreened mass singularities in the effective hard thermal loop vertices in the case of a massless external photon.

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R. Baier, S. Peigné, D. Schiff. 1993-11-22. Soft Photon Production Rate in Resummed Perturbation Theory of High Temperature QCD. https://doi.org/10.1007/bf01560248

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