Thermal Effects on Two-photon Decays of Pseudo-scalars
High Energy Physics - Phenomenology
2007-05-23 v1
Abstract
We study the effect of finite temperatures and Fermion density on the effective pseudo-scalar-photon vertex induced by the triangle diagram. The manifestly covariant calculations show that when the pseudo-scalar mass is much less than the temperature, then there is a large enhancement of the decay rate. Alternatively, when the temperature is much higher than the Fermion mass, or the Fermion chemical potential is large, the lifetime is enhanced. Other related processes, and applications of these results to cosmology and astrophysics, are discussed.
Keywords
Cite
@article{arxiv.hep-ph/9702205,
title = {Thermal Effects on Two-photon Decays of Pseudo-scalars},
author = {Sourendu Gupta and S. N. Nayak},
journal= {arXiv preprint arXiv:hep-ph/9702205},
year = {2007}
}
Comments
17 pages, 1 figure (2 ps file).