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Natural leptogenesis and neutrino masses with two Higgs doublets
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abstract
The minimal Type I see-saw model cannot explain the observed neutrino masses and the baryon asymmetry of the Universe via hierarchical thermal leptogenesis without ceding naturalness. We show that this conclusion can be avoided by adding a second Higgs doublet with $\tan\beta\gtrsim 4$. The models considered naturally accommodate a SM-like Higgs boson, and predict TeV-scale scalar states and low- to intermediate-scale hierarchical leptogenesis with $10^3\text{ GeV}\lesssim M_{N_1}\lesssim 10^8\text{ GeV}$.
Forward citations
Cited by 2 Pith papers
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Spontaneous Scoto-leptogenesis
A rolling Majoron from broken global B-L symmetry generates the baryon asymmetry at TeV-scale right-handed neutrino masses in the scotogenic model, consistent with neutrino and dark matter constraints.
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Low-scale leptogenesis in the scotogenic model: spectator processes and benchmark points
TeV-scale leptogenesis in the scotogenic model is viable with proper treatment of spectator processes, yielding benchmark points that reproduce the baryon asymmetry and predict observable CLFV rates.
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