APEC Seminar (Astronomy - Particle Physics - Experimental Physics - Cosmology)

Speaker: Neil Barrie (IBS)
Title: Type II Seesaw Leptogenesis
Date (JST): Wed, Nov 02, 2022, 14:00 - 15:00
Place: Hybrid
Abstract: 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. However, this simple extension was believed to be unable to successfully explain the observed baryon asymmetry of the universe through Leptogenesis. We have demonstrated that the triplet Higgs of the Type II Seesaw Mechanism 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 a triplet Higgs mass as low as 800 GeV, and predicts that the neutral component obtains a small vacuum expectation value v_&#8710;< 10 keV. I will discuss the rich phenomenology of our model which can be tested by various terrestrial experiments as well as by astronomical 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 neutrinoless double beta decay experiments.