Speaker
Zhong Zhang
(UCL)
Description
Heavy Neutral Leptons (HNLs) are a popular extension of the Standard Model to explain the lightness of neutrino masses and the matter-antimatter asymmetry through leptogenesis. Cosmology can constraint the regime of active-sterile neutrino mixing in a standard Seesaw scenario of neutrino mass generation for HNL masses around $m_N \lesssim 1$~GeV. Motivated by this, we analyse HNL-ALP coupling and its impact on cosmology. Following an analytic discussion of the Big Bang Nucleosynthesis, ALP populations and other cosmological facts which can constraint the nature of sterile neutrinos and ALPs.
| Are you happy for your talk to be recorded? | Yes |
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| Please select the most relevant category | Astroparticle |
| Would you be interested in receiving feedback on your presentation? | Yes |
Primary author
Zhong Zhang
(UCL)
