Leiden University Scholarly Publications

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Bondarenko, K.; Boyarsky, A.; Klaric, J.; Mikulenko, O.; Ruchayskiy, O.; Syvolap, V.; Timiryasov, I. (2021)

An allowed window for heavy neutral leptons below the kaon mass

Article / Letter to editor
The extension of the Standard Model with two gauge-singlet Majorana fermions can simultaneously explain two beyond-the-Standard-model phenomena: neutrino masses and oscillations, as well as the origin of the matter-antimatter asymmetry in the Universe. The parameters of such a model are constrained by the neutrino oscillation data, direct accelerator searches, big bang nucleosynthesis, and requirement of successful baryogenesis. We show that their combination still leaves an allowed region in the parameter space below the kaon mass. This region can be probed by the further searches of NA62, DUNE, or SHiP experiments.
All authors
Bondarenko, K.; Boyarsky, A.; Klaric, J.; Mikulenko, O.; Ruchayskiy, O.; Syvolap, V.; Timiryasov, I.
Date
2021-07-26
Journal
Journal of High Energy Physics
Volume
2021
DOI
doi:10.1007/JHEP07(2021)193