Speaker
Morozumi
Description
We study the space-time evolution of the lepton number densities of Majorana neutrinos at low energies. We study it for three neutrinos
cases preparing the initial state with momentum distribution amplitude
localized at the space-time origin. The case that the lightest neutrino is massless and the other case with three massive neutrinos are studied.
These two cases can be distinguished by the lepton number densities.
Another related topic which I plan to talk is the implication of the rank two effective Majorana mass matrix at low energies. I will talk about how the present neutrino data constrain the mass matrix and how the information constrain the type I seesaw model with two right-handed neutrinos.