Minimal Seesaw Model: Testable Leptogenesis & CP violation

by Jacobo Lopez Pavon (CERN)

Friday 15 Dec 2017, 14:00 → 15:00 Europe/Zurich

4/S-030 (CERN)

The simplest extension of the SM that can account for neutrino masses consists in the addition of 2 right-handed neutrinos to the SM field content. 
In addition to the generation of the light neutrino mass and mixing pattern measured in neutrino oscillations, the low scale realization of the model provides an explanation for the matter-antimatter asymmetry of the Universe via ARS leptogenesis, with right-handed neutrino masses in the range [0.1-100] GeV.  The heavy states can thus be produced and searched for in beam dump experiments, as SHiP or DUNE, and collider experiments as FCC-ee. I will show that for O(GeV) scale right-handed neutrinos, future experimental data can provide sufficient information to predict the matter-antimatter asymmetry of the universe. Furthermore, the flavor structure of the minimal model is extremely constrained and shows a very interesting correlation with the PMNS CP-phases which opens a new window for leptonic CP violation. Finally, I will address the implications of the possible existence of extra generic higher energy new physics which I parametrize in terms of a low-energy effective theory.

TestableLeptogenesis.pdf