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  • Open Access

Scale invariant radiative neutrino mass model

Daijiro Suematsu*

  • *Contact author: suematsu@hep.s.kanazawa-u.ac.jp
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Phys. Rev. D 114, 015029 – Published 20 July, 2026

DOI: https://doi.org/10.1103/9r8v-12cn

Abstract

We propose a scale invariant radiative neutrino mass model with custodial symmetry by introducing two real singlet scalars to the scotogenic model. Masses of an inert doublet scalar and right-handed neutrinos are induced by a vacuum expectation value (VEV) of a singlet scalar caused through the Coleman-Weinberg mechanism. It violates spontaneously both the custodial symmetry and the scale invariance. The weak scale can take a suppressed value compared with the singlet scalar VEV because of the custodial symmetry. In this framework we study phenomenological consequences for neutrino mass, dark matter, and baryon number asymmetry by assuming a texture for neutrino Yukawa couplings. Since the required dark matter abundance cannot be explained by a neutral component of the inert doublet scalar in that case, the lightest right-handed neutrino should be dark matter. Mass of the dark matter is predicted to be less than O(1)  MeV and baryon number asymmetry could be explained through resonant leptogenesis.

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Phys. Rev. D 114, 015029– Published 20 July, 2026
  • Received 15 February 2026
  • Revised 29 June 2026
  • Accepted 7 July 2026
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