Radiative seesaw: Warm dark matter, collider and lepton flavour violating signals

Abstract

Extending the standard model with three right-handed neutrinos ($N_k$) and a second Higgs doublet ($\eta$), odd under the discrete parity symmetry $Z_2$, Majorana neutrino masses can be generated at 1-loop order. In the resulting model, the lightest stable particle, either a boson or a fermion, might be a dark matter candidate. Here we assume a specific mass spectrum ($M_1\ll M_2<M_3<m_{\eta }$) and derive its consequences for dark matter and collider phenomenology. We show that (i) the lightest right-handed neutrino is a warm dark matter particle that can give a $\sim$10% contribution to the dark matter density; (ii) several decay branching ratios of the charged scalar can be predicted from measured neutrino data. Especially interesting is that large lepton flavour violating rates in muon and tau final states are expected. Finally, we derive upper bounds on the right-handed neutrino Yukawa couplings from the current experimental limit on $Br(\mu \to e\gamma )$.

25 pages, 7 figures. A few clarifications and references added, collider physics improved, conclusions unchanged. Version matches publication in PRD (Title changed in journal)

References in corpus (24)

• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• Sterile neutrinos, dark matter, and the pulsar velocities in models with a Higgs singlet
• Can sterile neutrinos be the dark matter?
• Dark-matter sterile neutrinos in models with a gauge singlet in the Higgs sector
• Observing the Dark Scalar Doublet and its Impact on the Standard-Model Higgs Boson at Colliders
• Cold Dark Matter, Radiative Neutrino Mass, mu to e gamma, and Neutrinoless Double Beta Decay
• Can sterile neutrinos be ruled out as warm dark matter candidates?
• How cold is cold dark matter? Small scales constraints from the flux power spectrum of the high-redshift Lyman-alpha forest
• Impact of dark matter decays and annihilations on reionization
• Prospects for the Zee-Babu Model at the LHC and low energy experiments
• Constraints on decaying Dark Matter from XMM-Newton observations of M31
• Decaying warm dark matter and neutrino masses
• Neutrino mass hierarchy and Majorana CP phases within the Higgs triplet model at the LHC
• Z_3 Dark Matter and Two-Loop Neutrino Mass
• Leptoquarks: Neutrino masses and accelerator phenomenology
• Minimal supergravity sneutrino dark matter and inverse seesaw neutrino masses
• Neutrino masses and CDM in a non-supersymmetric model
• Clustering properties of a sterile neutrino dark matter candidate
• Small-scale structure formation properties of chilled sterile neutrinos as dark matter
• Sterile neutrinos as subdominant warm dark matter
• Probing bilinear R-parity violating supergravity at the LHC
• D6 Family Symmetry and Cold Dark Matter at LHC
• Spontaneous R-parity violation: Lightest neutralino decays and neutrino mixing angles at future colliders
• Novel Higgs decay signals in R-parity violating models

Cited by in corpus (37)

• From the trees to the forest: a review of radiative neutrino mass models
• The Inert Dark Matter
• Probing the scotogenic model with lepton flavor violating processes
• The low-scale approach to neutrino masses
• Fermion Triplet Dark Matter and Radiative Neutrino Mass
• Systematic classification of two-loop realizations of the Weinberg operator
• Reconciliation of CDM abundance and $\mu \to e\gamma$ in a radiative seesaw model
• FIMP realization of the scotogenic model
• Anomaly Induced Dark Matter Decay and PAMELA/ATIC Experiments
• An R-parity conserving radiative neutrino mass model without right-handed neutrinos
• Triviality and vacuum stability bounds in the three-loop neutrino mass model
• Fermionic WIMPs and Vacuum Stability in the Scotogenic Model
• Dark matter, neutrino masses and high scale validity of an inert Higgs doublet model
• Confronting Flavour Symmetries and extended Scalar Sectors with Lepton Flavour Violation Bounds
• Dark matter in the supersymmetric radiative seesaw model with an anomalous U(1) symmetry
• Introduction to Charged Lepton Flavour Violation
• Exploring X-Ray Lines as Scotogenic Signals
• Unraveling the Scotogenic Model at Muon Collider
• Proton decay at 1-loop
• Universal Inverse seesaw mechanism as a source of the SM fermion mass hierarchy
• Testing Type II Radiative Seesaw Model: from Dark Matter Detection to LHC Signatures
• Signals of dark matter in a supersymmetric two dark matter model
• Inflation in a modified radiative seesaw model
• Influence of an inert charged Higgs boson on the muon $g-2$ and radiative neutrino masses in a scotogenic model
• Predictive Scotogenic Model with Flavor Dependent Symmetry
• The Sommerfeld Enhancement in the Scotogenic Model with Large Electroweak Scalar Multiplets
• Leptogenesis in a neutrino mass model coupled with inflaton
• Dark matter in a charged variant of the Scotogenic model
• Constraining models for keV sterile neutrinos by quasi-degenerate active neutrinos
• Inflation connected to the origin of $CP$ violation
• One-loop Matching of Scotogenic Model onto Standard Model Effective Field Theory up to Dimension 7
• Fermion mass hierarchy and g-2 anomalies in an extended 3HDM Model
• Possible roles of Peccei-Quinn symmetry in an effective low energy model
• Tiny neutrino mass from SUSY and lepton number breaking sector
• Feasibility to probe the dynamical scotogenic model at the LHC
• Type-III Scotogenic Model: Inflation, Dark Matter and Collider Phenomenology
• Effects of virtual Majorana neutrinos on charged Lepton Flavor Violation decays from a seesaw variant with radiatively induced light neutrino masses