Speaker: Isabel Oldengott

Abstract:

In this talk I investigate the impact of non-standard neutrino interactions on the CMB anisotropy spectrum. Such interactions appear e.g. in Majoron models which try to explain the mechanism of neutrino mass generation. We discard the rough approximation of tightly coupled neutrinos, which is commonly used in the literature. Instead, we derive the full Boltzmann hierarchy of interacting neutrinos.