Cosmology of "Visible" Sterile Neutrinos

Abstract

We point out that in scenarios with a low reheating temperature $T_R<<100$ MeV at the end of (the last episode of) inflation or entropy production, the abundance of sterile neutrinos becomes largely independent of their coupling to active neutrinos. Thus, cosmological bounds become less stringent than usually assumed, allowing sterile neutrinos to be ``visible'' in future experiments. For example, the sterile neutrino required by the LSND result does not have any cosmological problem within these scenarios.

Talk given at the ``8th Workshop on Non-Perturbative Quantum Chromodynamics", June 7-11, 2004, Paris, France; 7 pages, 2 figures

References in corpus (2)

• What is the lowest possible reheating temperature?
• Low reheating temperature and the visible sterile neutrino

Cited by in corpus (3)

• MeV sterile neutrinos in low reheating temperature cosmological scenarios
• Experimental signatures of non-standard pre-BBN cosmologies
• Observational evidences for the existence of 17.4 keV decaying degenerate sterile neutrinos near the Galactic Center