Logo
ScienceStack
Table of Contents
Fetching ...
Sign In

Scale invariant radiative neutrino mass model

Daijiro Suematsu

Abstract

We propose a scale invariant radiative neutrino mass model with custodial symmetry. 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. Since the required dark matter abundance cannot be explained by a neutral component of the inert doublet scalar, 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.

Scale invariant radiative neutrino mass model

Abstract

We propose a scale invariant radiative neutrino mass model with custodial symmetry. 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. Since the required dark matter abundance cannot be explained by a neutral component of the inert doublet scalar, the lightest right-handed neutrino should be dark matter. Mass of the dark matter is predicted to be less than MeV and baryon number asymmetry could be explained through resonant leptogenesis.
Paper Structure (7 sections, 38 equations, 4 figures)

This paper contains 7 sections, 38 equations, 4 figures.

Table of Contents

  1. Introduction
  2. Scale invariant scotogenic model
  3. Phenomenological consequences
  4. Neutrino mass
  5. Dark matter
  6. Baryon number asymmetry
  7. Summary

Figures (4)

  • Figure :
  • Figure :
  • Figure :
  • Figure :