Cosmological Constraints on Neutrino Injection
High Energy Physics - Phenomenology
2008-11-26 v1 Astrophysics
Abstract
We derive general constraints on the relic abundances of a long-lived particle which mainly decays into a neutrino (and something else) at cosmological time scales. Such an exotic particle may show up in various particle-physics models based on physics beyond the standard model. The constraints are obtained from big-bang nucleosynthesis, cosmic microwave background and diffuse neutrino and photon fluxes, depending on the lifetime and the electromagnetic and hadronic branching ratios.
Keywords
Cite
@article{arxiv.0705.1200,
title = {Cosmological Constraints on Neutrino Injection},
author = {Toru Kanzaki and Masahiro Kawasaki and Kazunori Kohri and Takeo Moroi},
journal= {arXiv preprint arXiv:0705.1200},
year = {2008}
}
Comments
33 pages, 23 figures