The ScotoSinglet Model: A Scalar Singlet Extension of the Scotogenic Model

Abstract

The Scotogenic Model is one of the most minimal models to account for both neutrino masses and dark matter (DM). In this model, neutrino masses are generated at the one-loop level, and in principle, both the lightest fermion singlet and the lightest neutral component of the scalar doublet can be viable DM candidates. However, the correct DM relic abundance can only be obtained in somewhat small regions of the parameter space, as there are strong constraints stemming from lepton flavour violation, neutrino masses, electroweak precision tests and direct detection. For the case of scalar DM, a sufficiently large lepton-number-violating coupling is required, whereas for fermionic DM, coannihilations are typically necessary. In this work, we study how the new scalar singlet modifies the phenomenology of the Scotogenic Model, particularly in the case of scalar DM. We find that the new singlet modifies both the phenomenology of neutrino masses and scalar DM, and opens up a large portion of the parameter space of the original model.

34 pages, 9 figures, 4 tables; v2: matches version published in JHEP without Refs. [17, 18]

References in corpus (15)

• Improved Naturalness with a Heavy Higgs: An Alternative Road to LHC Physics
• From the trees to the forest: a review of radiative neutrino mass models
• Singlet-Catalyzed Electroweak Phase Transitions and Precision Higgs Studies
• Basis-independent methods for the two-Higgs-doublet model III: The CP-conserving limit, custodial symmetry, and the oblique parameters S, T, U
• Status of the Inert Doublet Model and the Role of multileptons at the LHC
• Toward (Finally!) Ruling Out Z and Higgs Mediated Dark Matter Models
• Probing the scotogenic model with lepton flavor violating processes
• The low-scale approach to neutrino masses
• Reconciliation of CDM abundance and $\mu \to e\gamma$ in a radiative seesaw model
• Radiative seesaw: Warm dark matter, collider and lepton flavour violating signals
• FIMP realization of the scotogenic model
• Probing the scotogenic FIMP at the LHC
• Fermionic WIMPs and Vacuum Stability in the Scotogenic Model
• Inert Doublet Dark Matter with an additional scalar singlet and 125 GeV Higgs Boson
• Inflation and DM phenomenology in a scotogenic model extended with a real singlet scalar

Cited by in corpus (6)

• Flavour and dark matter in a scoto/type-II seesaw model
• Long lived inert Higgs in fast expanding universe and its imprint on cosmic microwave background
• Neutrino masses from new seesaw models: Low-scale variants and phenomenological implications
• Generalised Casas-Ibarra Parametrisation for Majorana Neutrino Masses
• $W$ boson mass shift, dark matter and $(g-2{)}_{\ell }$ in a scotogenic-Zee model
• Sterile neutrino portals to Majorana dark matter: effective operators and UV completions