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Revisiting the model for radiative neutrino masses with dark matter in the U(1)B−L gauge theory

Shinya Kanemura*, Yushi Mura†, and Guohao Ying‡

  • *Contact author: kanemu@het.phys.sci.osaka-u.ac.jp
  • †Contact author: y_mura@het.phys.sci.osaka-u.ac.jp
  • ‡Contact author: ying@het.phys.sci.osaka-u.ac.jp
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Phys. Rev. D 112, 035018 – Published 13 August, 2025

DOI: https://doi.org/10.1103/sbrn-z9sn

Abstract

The radiative seesaw model with gauged U(1)B−L×Z2 extension is a well-motivated scenario that gives consistent predictions of active neutrino masses and the abundance of dark matter. Majorana masses of right-handed neutrinos, the lightest of which can be identified as dark matter, are given by the spontaneous breaking of the U(1)B−L gauge symmetry. We revisit this model with the latest constraints from dark-matter searches, neutrino oscillations, flavor experiments, and collider experiments. We examine several benchmark scenarios and identify the valid parameter space of this model, finding that there are still allowed regions under the latest experimental constraints. We present new viable benchmark scenarios for this model, i.e., the right-handed neutrino dark-matter scenario and the scalar dark-matter scenario. We also mention the testability of these benchmark scenarios in future experiments.

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Phys. Rev. D 112, 035018– Published 13 August, 2025
  • Received 1 February 2025
  • Accepted 16 July 2025
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