In scenarios with a gravitino LSP, there exist strong BBN constraints on the abundance of a possible stau NLSP. We find that in settings with substantial left-right mixing of the stau mass eigenstates these constraints can be evaded even for very long-lived staus.
@article{arxiv.0808.0829,
title = {A note on the primordial abundance of stau NLSPs},
author = {Michael Ratz and Kai Schmidt-Hoberg and Martin Wolfgang Winkler},
journal= {arXiv preprint arXiv:0808.0829},
year = {2009}
}
Comments
17 pages, 5 figures, discussion on vacuum stability added