Two-loop Compton and annihilation processes in thermal QCD
High Energy Physics - Phenomenology
2009-10-31 v1
Abstract
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 necessary to obtain agreement with the naive perturbative expansion in the limit of vanishing thermal masses.
Keywords
Cite
@article{arxiv.hep-ph/9903307,
title = {Two-loop Compton and annihilation processes in thermal QCD},
author = {Patrick Aurenche and Francois Gelis and Randy Kobes and Haitham Zaraket},
journal= {arXiv preprint arXiv:hep-ph/9903307},
year = {2009}
}
Comments
Latex, 24 pages, postscript figures included with the package graphics