Production of [Gamma]-[Gamma] pairs in a hot quark-gluon plasma and shielding of the quark mass singularity

Baier R, Nakkagawa H, Niegawa A, Redlich K (1992)
Physical review D: Particles, fields, gravitation, and cosmology 45(11): 4323-4332.

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We study the thermal production of large-invariant-mass photon pairs emitted from a quark-gluon plasma at high temperature. To lowest order in perturbation theory the cross section for the annihilation process (qqBAR-->gamma-gamma) is known to lead to logarithmically divergent thermal production rates for massless quarks. We apply recently developed resummation methods of finite-temperature perturbation theory and show how screening effects on quarks in the plasma provide finite thermal rates for gamma-gamma pairs. We compare these results with previous estimates of gamma-gamma production rates. Finally, for the phenomenology of heavy-ion collisions we present the screened gamma-gamma emission spectra by taking into account the space-time history of these collisions.
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Baier R, Nakkagawa H, Niegawa A, Redlich K. Production of [Gamma]-[Gamma] pairs in a hot quark-gluon plasma and shielding of the quark mass singularity. Physical review D: Particles, fields, gravitation, and cosmology. 1992;45(11):4323-4332.
Baier, R., Nakkagawa, H., Niegawa, A., & Redlich, K. (1992). Production of [Gamma]-[Gamma] pairs in a hot quark-gluon plasma and shielding of the quark mass singularity. Physical review D: Particles, fields, gravitation, and cosmology, 45(11), 4323-4332.
Baier, R., Nakkagawa, H., Niegawa, A., and Redlich, K. (1992). Production of [Gamma]-[Gamma] pairs in a hot quark-gluon plasma and shielding of the quark mass singularity. Physical review D: Particles, fields, gravitation, and cosmology 45, 4323-4332.
Baier, R., et al., 1992. Production of [Gamma]-[Gamma] pairs in a hot quark-gluon plasma and shielding of the quark mass singularity. Physical review D: Particles, fields, gravitation, and cosmology, 45(11), p 4323-4332.
R. Baier, et al., “Production of [Gamma]-[Gamma] pairs in a hot quark-gluon plasma and shielding of the quark mass singularity”, Physical review D: Particles, fields, gravitation, and cosmology, vol. 45, 1992, pp. 4323-4332.
Baier, R., Nakkagawa, H., Niegawa, A., Redlich, K.: Production of [Gamma]-[Gamma] pairs in a hot quark-gluon plasma and shielding of the quark mass singularity. Physical review D: Particles, fields, gravitation, and cosmology. 45, 4323-4332 (1992).
Baier, Rudolf, Nakkagawa, H., Niegawa, A., and Redlich, K. “Production of [Gamma]-[Gamma] pairs in a hot quark-gluon plasma and shielding of the quark mass singularity”. Physical review D: Particles, fields, gravitation, and cosmology 45.11 (1992): 4323-4332.
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