Baryogenesis via leptonic CP-violating phase transition

Understand

We propose a new mechanism to generate a lepton asymmetry based on the vacuum CP-violating phase transition (CPPT).

• This approach differs from classical thermal leptogenesis as a specific seesaw model, and its UV completion, need not be specified.
• The lepton asymmetry is generated via the dynamically realised coupling of the Weinberg operator during the phase transition.
• This mechanism provides a connection with low-energy neutrino observables.