Enhanced photon production from quark-gluon plasma: Finite-lifetime effect
High Energy Physics - Phenomenology
2009-12-31 v2 Condensed Matter
Nuclear Theory
Abstract
Photon production from a thermalized quark-gluon plasma of finite lifetime is studied directly in real time with a nonequilibrium formulation that includes off-shell (energy nonconserving) effects. To lowest order we find that production of direct photons form a quark-gluon plasma of temperature T ~ 200 MeV and lifetime t ~ 10-20 fm/c is strongly enhanced by off-shell (anti)quark bremsstrahlung q(\bar{q})->q(\bar{q})\gamma. The yield from this nonequilibrium finite-lifetime effect dominates over those obtained from higher order equilibrium rate calculations in the range of energy E > 2 GeV and falls off with a power law for E >> T.
Keywords
Cite
@article{arxiv.hep-ph/0009215,
title = {Enhanced photon production from quark-gluon plasma: Finite-lifetime effect},
author = {Shang-Yung Wang and Daniel Boyanovsky},
journal= {arXiv preprint arXiv:hep-ph/0009215},
year = {2009}
}
Comments
RevTeX, 5 pages, 3 figures, minor change in text and updated figures, to appear in Phys. Rev. D