Speaker
Dr
Sergio Palomares Ruiz
(IST Lisbon)
Description
It is commonly assumed that the cosmological and astrophysical bounds
on the mixings of sterile with active neutrinos are much more
stringent than those obtained from laboratory measurements. We point
out that in scenarios with a very low reheating temperature T_RH <<
100 MeV at the end of (the last episode of) inflation or entropy
creation, the abundance of sterile neutrinos becomes largely
suppressed with respect to that obtained within the standard
framework. Thus, in this case cosmological bounds become much less
stringent than usually assumed, allowing sterile neutrinos to be
``visible'' in future experiments.
Author
Dr
Sergio Palomares Ruiz
(IST Lisbon)
