Extremely weak and super-efficient production of keV sterile neutrino: phase transition and induced parametric resonance creation.
August 02, 2019
We introduce a novel generation mechanism of sterile neutrinos in the presence of a light coherently oscillating scalar field. This field modulates the mass of sterile neutrino in the early Universe providing non-trivial oscillation dynamics. In a region of model parameters oscillations between active and sterile neutrinos are resonantly enhanced. This mechanism allows sterile neutrinos with extremely small mixing to produce Dark Matter (DM) evading X-ray constraints. At the same time the spectrum of produced particles is cooler than in case of ordinary non-resonant production of sterile neutrinos, thus opening a window of lower masses which is otherwise forbidden by structure formation constraints.
How to cite
Metadata are provided both in "article" format (very similar to INSPIRE) as this helps creating
very compact bibliographies which can be beneficial to authors and
readers, and in "proceeding" format
which is more detailed and complete.