Regular Article – Theoretical Physics
Low scale leptogenesis in a model with promising CP structure
Institute for Theoretical Physics, Kanazawa University, 920-1192, Kanazawa, Japan
Accepted: 1 April 2021
Published online: 12 April 2021
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 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.
© The Author(s) 2021
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