In a two-heavy-neutral-lepton seesaw with large imaginary Casas-Ibarra angle, the cLFV matrices S and R become rank-one related, and the resulting baryon asymmetry vanishes at leading order.
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Constraints on the neutrino extension of the Standard Model and baryon asymmetry of the Universe
In a two-heavy-neutral-lepton seesaw with large imaginary Casas-Ibarra angle, the cLFV matrices S and R become rank-one related, and the resulting baryon asymmetry vanishes at leading order.