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5–9 Dec 2022
Australia/Sydney timezone

Type II Seesaw Leptogenesis

5 Dec 2022, 14:20
20m
149 (Old Main Building)

149

Old Main Building

Inflation and early Universe cosmology Early Universe

Speaker

Neil Barrie

Description

The Type II Seesaw Mechanism provides a minimal framework to explain the neutrino masses involving the introduction of a single triplet Higgs to the Standard Model. We have demonstrated that this triplet Higgs alone can simultaneously generate the observed baryon asymmetry of the universe and the neutrino masses while playing a role in setting up Inflation. This is achievable with masses as low as 800 GeV, and predicts that the neutral component obtains a small vacuum expectation value v_∆< 10 keV. I will discuss the rich phenomenology of our model which can be tested by various terrestrial experiments as well as by cosmological observations. In particular, the successful parameter region may be probed at a future 100 TeV collider, upcoming lepton flavor violation experiments such as Mu3e and COMET, and neutrinoless double beta decay experiments.

Author

Neil Barrie

Co-authors

Prof. Chengcheng Han (SYSU) Hitoshi Murayama Serguey Petcov (SISSA)

Presentation materials