Speaker
Martina Cataldi
(Hamburg University)
Description
We study leptogenesis from the decays of sterile (right-handed) neutrinos produced from bubble collisions at a first order phase transition. We explore the new parameter space opened up by this new mechanism, making comparisons with other existing leptogenesis scenarios (in particular involving bubbles), and find that bubble collisions enable leptogenesis with RHNs at the natural mass scale $10^{14}$ GeV, where they can also give rise to SM neutrino masses via type-I seesaw with $\mathcal{O}(1)$ couplings. The relevant phase transitions are at $\gtrsim 10^8$ GeV, and can be within reach of future gravitational wave experiments.
Authors
Bibhushan Shakya
(Hamburg University, DESY)
Martina Cataldi
(Hamburg University)
