Speakers
Daniela Kirilova
(Institute of Astronomy and NAO, Bulgarian Academy of Sciences)
Daniela Kirilova
(Unknown)
Description
We present updated cosmological nucleosynthesis constraints on several models of neutrino beyond Standard Model Physics. Namely, first on the basis of the recent precise determination of the primordial abundance of He-4 we have updated the cosmological consraints on electron-sterile neutrino oscillations parameters. Second. we derive cosmological constraint on the lepton asymmetry in the model of degenerate primordial nucleosynthesis with neutrino oscillations and discuss a solution to the dark radiation problem in such a model. Third, we present updated constraints on the freezing temperature of the sterile neutrino in a model of right-handed neutrinos interacting with chiral tensor particles.
