Dark matter and radiative neutrino masses in conversion-driven scotogenesis

Julian Heeck (Department of Physics, University of Virginia, Charlottesville, Virginia 22904-4714, USA) ; Jan Heisig (Department of Physics, University of Virginia, Charlottesville, Virginia 22904-4714, USA) ; Anil Thapa (Department of Physics, University of Virginia, Charlottesville, Virginia 22904-4714, USA)

The scotogenic model generates Majorana neutrino masses radiatively, with dark matter particles running in the loop. We explore the parameter space in which the relic density of fermionic dark matter is generated via a conversion-driven freeze-out mechanism. The necessity for small Yukawa couplings to initiate chemical decoupling for conversion processes naturally reproduces small neutrino masses as long as the active neutrinos are hierarchical. The model can also resolve the recently reported deviation in the W-boson mass while satisfying constraints from direct detection, charged lepton flavor violation as well as collider bounds. Parts of the parameter space lead to long-lived particle signatures to be probed at the LHC.

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Published on:
31 January 2023
Publisher:
APS
Published in:
Physical Review D , Volume 107 (2023)
Issue 1
DOI:
https://doi.org/10.1103/PhysRevD.107.015028
arXiv:
2211.13013
Copyrights:
Published by the American Physical Society
Licence:
CC-BY-4.0

Fulltext files: