Neutrinoless Universe
Astrophysics
2008-11-26 v2 High Energy Physics - Phenomenology
Abstract
We consider the consequences for the relic neutrino abundance if extra neutrino interactions are allowed, e.g., the coupling of neutrinos to a light (compared to ) boson. For a wide range of couplings not excluded by other considerations, the relic neutrinos would annihilate to bosons at late times, and thus make a negligible contribution to the matter density today. This mechanism evades the neutrino mass limits arising from large scale structure.
Cite
@article{arxiv.astro-ph/0404585,
title = {Neutrinoless Universe},
author = {John F. Beacom and Nicole F. Bell and Scott Dodelson},
journal= {arXiv preprint arXiv:astro-ph/0404585},
year = {2008}
}
Comments
4 pages, 2 figures. Minor changes. Accepted by PRL