Logo
ScienceStack
Table of Contents
Fetching ...
Sign In

Light fermionic dark matter window in the scotogenic inverse seesaw model

Huan-Can Liang, Yi Liao, Xiao-Dong Ma, Mu-Yuan Song, Hao-Lin Wang

Abstract

The origin of neutrino mass and the nature of dark matter (DM) remain unresolved puzzles in particle physics, and an appealing possibility is to address both in a unified picture. This paper explores a light fermionic DM candidate within the scotogenic inverse seesaw model, which can simultaneously provide a mechanism for neutrino mass generation. By incorporating constraints from neutrino oscillation data, charged lepton flavor violating processes, invisible decays of the Higgs and $Z$ bosons, DM relic density, and direct detection of DM, we uncover a light fermionic DM window in the mass range $58\,{\rm GeV} \lesssim m_{\tt DM} \lesssim 63\,{\rm GeV}$ that can satisfy all of the aforementioned constraints. We find that this window can be jointly tested by next-generation ton-scale DM direct detection experiments including PandaX-xT and XENONnT, Higgs invisible decays, and future lepton colliders such as ILC.

Light fermionic dark matter window in the scotogenic inverse seesaw model

Abstract

The origin of neutrino mass and the nature of dark matter (DM) remain unresolved puzzles in particle physics, and an appealing possibility is to address both in a unified picture. This paper explores a light fermionic DM candidate within the scotogenic inverse seesaw model, which can simultaneously provide a mechanism for neutrino mass generation. By incorporating constraints from neutrino oscillation data, charged lepton flavor violating processes, invisible decays of the Higgs and bosons, DM relic density, and direct detection of DM, we uncover a light fermionic DM window in the mass range that can satisfy all of the aforementioned constraints. We find that this window can be jointly tested by next-generation ton-scale DM direct detection experiments including PandaX-xT and XENONnT, Higgs invisible decays, and future lepton colliders such as ILC.
Paper Structure (11 sections, 36 equations, 11 figures, 3 tables)

This paper contains 11 sections, 36 equations, 11 figures, 3 tables.

Table of Contents

  1. Introduction
  2. The scotogenic inverse seesaw model
  3. Neutrino masses
  4. Lepton flavor violating processes
  5. Higgs and $Z$ boson invisible decays
  6. Dark matter phenomenology
  7. Dark matter relic density
  8. Dark matter direct detection
  9. Numerical analysis
  10. Dark matter at lepton collider
  11. Conclusion

Figures (11)

  • Figure 1: One-loop neutrino mass generation before (left) and after (right) electroweak symmetry breaking.
  • Figure 2: One-loop Feynman diagrams contributing to the CLFV process $\mu^- \to e^- \gamma$.
  • Figure 3: The left (right) panel shows the allowed parameter points projected onto the plane of SI (SD) DM-nucleon scattering cross section versus DM mass. The solid orange, blue, and purple curves show current $90\%$ C.L. exclusion limits from XENONnT XENON:2025vwd, PandaX-4T PandaX:2024qfu, and LZ LZ:2024zvo, respectively. The corresponding dashed curves represent their future sensitivity projections from XENONnT XENON:2020kmp, PandaX-xT PANDA-X:2024dlo, and LZ LZ:2018qzl.
  • Figure 4: Distributions of allowed parameter points satisfying all current experimental constraints in the $m_\chi$-$\overline{\sigma}^{\rm SI}$ (left panel) and $\sigma^{\rm SD}_n$-$\overline{\sigma}^{\rm SI}$ (right panel) planes. The horizontal and vertical gray lines represent the future direct detection sensitivities for the SI and SD cross sections, respectively.
  • Figure 5: Allowed parameter points in the $y_1$-$y_2$ plane, satisfying all current experimental constraints. The color scale in the left (right) panel represents the corresponding DM mass $m_\chi$ (heavy vector-like lepton mass $m_E$).
  • ...and 6 more figures