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An allowed window for heavy neutral leptons below the kaon mass

Authors
  • Bondarenko, Kyrylo1, 2
  • Boyarsky, Alexey3
  • Klaric, Juraj2
  • Mikulenko, Oleksii3, 4
  • Ruchayskiy, Oleg5
  • Syvolap, Vsevolod5
  • Timiryasov, Inar2
  • 1 Theoretical Physics Department, CERN, 1 Esplanade des Particules, Geneva 23, CH-1211, Switzerland , Geneva 23 (Switzerland)
  • 2 Institute of Physics, Laboratory for Particle Physics and Cosmology, École Polytechnique Fédérale de Lausanne, Lausanne, CH-1015, Switzerland , Lausanne (Switzerland)
  • 3 Leiden University, Niels Bohrweg 2, Leiden, 2333 CA, The Netherlands , Leiden (Netherlands)
  • 4 Taras Shevchenko National University of Kyiv, 64 Volodymyrs’ka str., Kyiv, 01601, Ukraine , Kyiv (Ukraine)
  • 5 University of Copenhagen, Blegdamsvej 17, Copenhagen, DK-2010, Denmark , Copenhagen (Denmark)
Type
Published Article
Journal
Journal of High Energy Physics
Publisher
Springer-Verlag
Publication Date
Jul 26, 2021
Volume
2021
Issue
7
Identifiers
DOI: 10.1007/JHEP07(2021)193
Source
Springer Nature
Keywords
Disciplines
  • Regular Article - Theoretical Physics
License
Green

Abstract

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.

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