Gravitino cosmology with a very light neutralino
High Energy Physics - Phenomenology
2012-05-07 v1 Cosmology and Nongalactic Astrophysics
High Energy Astrophysical Phenomena
Abstract
It has been shown that very light or even massless neutralinos are consistent with all current experiments, given non-universal gaugino masses. Furthermore, a very light neutralino is consistent with astrophysical bounds from supernov{\ae} and cosmological bounds on dark matter. Here we study the cosmological constraints on this scenario from Big Bang nucleosynthesis taking gravitinos into account and find that a very light neutralino is even favoured by current observations.
Keywords
Cite
@article{arxiv.1111.5715,
title = {Gravitino cosmology with a very light neutralino},
author = {Herbi K. Dreiner and Marja Hanussek and Jong-Soo Kim and Subir Sarkar},
journal= {arXiv preprint arXiv:1111.5715},
year = {2012}
}
Comments
9 pages, 3 figures