High Energy Phenomenology Seminar: Jim Cline (McGill) "A little theory of everything"
- Event Type
- Seminar/Symposium
- Sponsor
- Department of Physics
- Virtual
- Date
- Sep 17, 2021 12:00 pm
- Speaker
- Jim Cline (McGill)
- Contact
- Brandy Koebbe
- BKOEBBE@ILLINOIS.EDU
- Views
- 43
- Originating Calendar
- Physics - High Energy Physics Seminar
I present a minimal model that attempts to address the main missing ingredients of the standard model: inflation, baryogenesis, dark matter, and the origin of neutrino masses. We introduce a complex inflaton that decays into three generations of GeV-scale heavy neutral leptons, creating a lepton asymmetry
during inflation. One HNL is stable and provides (partially) asymmetric dark matter. A light scalar singlet is needed to suppress its symmetric relic density. Neutrino masses are generated by the usual seesaw mechanism, with heavy right-handed neutrinos above the inflation scale, and an MFV-like ansatz
that relates neutrino masses to the HNL couplings, that are then linked to the light neutrino properties with only one adjustable parameter. The stability of dark matter implies the lightest neutrino is massless.