1999/03/10 by P. Aurenche, Patrick Aurenche, Francois Gelis +4 · 1 citation
Physics and Astronomy · #Cosmology and Gravitation Theories #High-Energy Particle Collisions Research #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1103/physrevd.60.076002
published as Phys.Rev. D60 (1999) 076002 · Latex, 24 pages, postscript figures included with the package graphics
arxiv created 1999/03/10 · openalex publication_date 1999/08/26 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We calculate the Compton and annihilation production of a soft static lepton pair in a quark-gluon plasma in the two-loop approximation. We work in the context of the effective perturbative expansion based on the resummation of hard thermal loops. Double counting is avoided by subtracting appropriate counterterms. It is found that the two-loop diagrams give contributions of the same order as the one-loop diagram. Furthermore, these contributions are mandatory to obtain agreement with the naive perturbative expansion in the limit of vanishing thermal masses.