Volume 421 - Neutrino Oscillation Workshop (NOW2022) - Session V. Particle Physics in the Cosmos
Curing Sterile Neutrino Dark Matter with a Dark Force
J. Kersten
Full text: pdf
Pre-published on: December 28, 2022
Published on:
Abstract
We propose a novel mechanism to generate sterile neutrinos
$\nu_s$ in the early Universe, by converting ordinary neutrinos
$\nu_a$ in scattering processes $\nu_s\nu_a\to\nu_s\nu_s$.
After initial production by oscillations, this leads to an exponential
growth in the $\nu_s$ abundance. We show that such a production regime
naturally occurs for self-interacting $\nu_s$, and that this opens up
significant new parameter space where $\nu_s$ make up all of the
observed dark matter.
DOI: https://doi.org/10.22323/1.421.0090
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