Abstract
We consider the introduction of a complex scalar field carrying a global lepton number charge to the Standard Model and the Higgs inflation framework. The conditions are investigated under which this model can simultaneously ensure Higgs vacuum stability up to the Planck scale, successful inflation, non-thermal Leptogenesis via the pendulum mechanism, and light neutrino masses. These can be simultaneously achieved when the scalar lepton is minimally coupled to gravity, that is, when standard Higgs inflation and reheating proceed without the interference of the additional scalar degrees of freedom. If the scalar lepton also has a non-minimal coupling to gravity, a multi-field inflation scenario is induced, with interesting interplay between the successful inflation constraints and those from vacuum stability and Leptogenesis. The parameter region that can simultaneously achieve the above goals is explored.
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Barrie, N.D., Sugamoto, A., Takeuchi, T. et al. Higgs inflation, vacuum stability, and leptogenesis. J. High Energ. Phys. 2020, 72 (2020). https://doi.org/10.1007/JHEP08(2020)072
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DOI: https://doi.org/10.1007/JHEP08(2020)072