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# The XXX International Conference on Neutrino Physics and Astrophysics (Neutrino 2022)

30 May 2022 to 4 June 2022
Virtual Seoul
Asia/Seoul timezone

## Imprint of the Seesaw Mechanism on Feebly Interacting Dark Matter and the Baryon Asymmetry

Not scheduled
5m
Virtual Seoul

#### Virtual Seoul

Poster Sterile neutrinos

### Description

We show that the type-I seesaw, responsible for generating the light neutrino mass, itself is capable of accommodating one of the three right handed neutrinos as a freeze-in type of dark matter (DM) where the required smallness of the associated coupling is connected to the lightness of the (smallest) active neutrino mass. It turns out that (a) the non-thermal production of DM having mass $\leq \mathcal{O}(1)$ MeV (via decays of $W, Z$ bosons and SM Higgs) consistent with relic density as well as (b) its stability determine this smallest active neutrino mass uniquely $\sim {\mathcal{O}}(10^{-12})$ eV. On the other hand, study of flavor leptogenesis in this scenario (taking into account the
latest neutrino data and Higgs vacuum stability issue) fixes the scale of two other right handed neutrinos.

Collaboration Prof. Arunansu Sil, Arghyajit Datta

### Primary author

Rishav Roshan (Kyungpook National University)

### Presentation Materials

There are no materials yet.