TeV Scale Neutrino Mass Generation, Minimal Inelastic Dark Matter, and High Scale Leptogenesis

Abstract

The seesaw and leptogenesis commonly depend on the masses of same particles, and thus are both realized at the same scale. In this work, we demonstrate a new possibility to realize a TeV-scale neutrino seesaw and a natural high-scale leptogenesis. We extend the standard model by two gauge-singlet scalars, a vector-like iso-doublet fermion and one iso-triplet Higgs scalar. Our model respects a softly broken lepton number and an exactly conserved $Z_2$ discrete symmetry. It can achieve three things altogether: (i) realizing a testable type-II seesaw at TeV scale with two nonzero neutrino mass-eigenvalues, (ii) providing a minimal inelastic dark matter from the new fermion doublets, and (iii) accommodating a thermal or nonthermal leptogenesis through the singlet scalar decays. We further analyze the current experimental constraints on our model and discuss the implications for the dark matter direct detections and the LHC searches.

PRD final version. 20 pages and 3 figures. Only minor refinements on the presentation and discussions, all conclusions un-changed, references added

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Cited by in corpus (10)

• Impact of Fermionic Electroweak Multiplet Dark Matter on Vacuum Stability with One-loop Matching
• Top quark as a probe of heavy Majorana neutrino at the LHC and future collider
• Common origin of radiative neutrino mass, dark matter and leptogenesis in scotogenic Georgi-Machacek model
• A new feasible dark matter region in the singlet scalar scotogenic model
• GeV Scale Inelastic Dark Matter with Dark Photon Mediator via Direct Detection and Cosmological/Laboratory Constraints
• Connecting Low scale Seesaw for Neutrino Mass to Inelastic sub-GeV Dark Matter with Abelian Gauge Symmetry
• Probing a new decay of vector-like top partner mediated by heavy Majorana neutrino via single production
• Probing quadruplet scalar dark matter at current and future $pp$ colliders
• Inert sextuplet scalar dark matter at the LHC and future colliders
• Probing vector-like top partner from same-sign dilepton events at the LHC