Mixing of gravitons with photons in primordial magnetic fields
arXiv:1307.7883
Abstract
Here I discuss the conversion of relic gravitons into photons in large scale cosmological magnetic fields. It is shown that the conversion probability is quite large at the post recombination epoch with a rather large density of formed photons. The produced electromagnetic radiation could make a substantial contribution to the cosmic extragalactic background light and even explain the cosmic x ray background excess.
4 pages, 3 figures. Talk presented at the "25th Rencontres de Blois, Particle Physics and Cosmology" 26-31 May 2013. To be published at the conference preceedings