Low scale leptogenesis in a model with promising $CP$ structure

Abstract

We consider a simple extension of the standard model, which could give a solution to its $CP$ issues through both the Peccei-Quinn mechanism and the Nelson-Barr mechanism. Its low energy effective model coincides with the scotogenic model in the leptonic sector. Although leptogenesis is known not to work well at lower reheating temperature than $10^9$ GeV in simple seesaw and scotogenic frameworks, such low reheating temperature could be consistent with both neutrino mass generation and thermal leptogenesis via newly introduced fields without referring to the resonance effect. An alternative dark matter candidate to axion is prepared as an indispensable ingredient of the model.

18 pages, 1 figure

References in corpus (11)

• The Standard Model Higgs boson as the inflaton
• Flaxion: a minimal extension to solve puzzles in the standard model
• Inelastic Dark Matter in Light of DAMA/LIBRA
• Candidates for Inelastic Dark Matter
• Reconciliation of CDM abundance and $\mu \to e\gamma$ in a radiative seesaw model
• The Inert Doublet Model and Inelastic Dark Matter
• DAMA and WIMP dark matter
• Inflation in a modified radiative seesaw model
• Leptogenesis in a neutrino mass model coupled with inflaton
• Inflation and DM phenomenology in a scotogenic model extended with a real singlet scalar
• Possible roles of Peccei-Quinn symmetry in an effective low energy model

Cited by in corpus (1)

• Inflation connected to the origin of $CP$ violation