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: March 28, 2023
Abstract
We propose a novel mechanism to generate sterile neutrinos
νs in the early Universe, by converting ordinary neutrinos
νa in scattering processes νsνaνsνs.
After initial production by oscillations, this leads to an exponential
growth in the νs abundance. We show that such a production regime
naturally occurs for self-interacting νs, and that this opens up
significant new parameter space where νs make up all of the
observed dark matter.
DOI: https://doi.org/10.22323/1.421.0090
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