The Visible Sterile Neutrino
Tuesday 4 May, 2:30 pm, Curia II
Sergio Palomares-Ruiz (UCLA)
@: sergiopr AT physics.ucla.edu

In this talk I present a scenario, based on a low reheating temperature
T_R << 100 MeV at the end of (the last episode of) inflation, in which the
coupling of sterile neutrinos to active neutrinos can be as large as
experimental bounds permit (thus making this neutrino ``visible'' in
future experiments). In previous models this coupling was forced to be
very small to prevent a cosmological overabundance of sterile neutrinos.
Here the abundance depends on how low the reheating temperature is. For
example, the sterile neutrino required by the LSND result does not have
any cosmological problem within our scenario.