TY  - JOUR
AB  - 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.
DA  - 1992
DO  - 10.1103/PhysRevD.45.4323
LA  - eng
IS  - 11
M2  - 4323
PY  - 1992
SN  - 0556-2821
SP  - 4323-4332
T2  - Physical review D: Particles, fields, gravitation, and cosmology
TI  - Production of [Gamma]-[Gamma] pairs in a hot quark-gluon plasma and shielding of the quark mass singularity
UR  - https://nbn-resolving.org/urn:nbn:de:0070-pub-17808827
Y2  - 2024-11-22T03:41:45
ER  -