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Updated: Jul 10, 2026

Setting Limits on Supersymmetry Using Simplified Models
Published on: November 15, 2013
Insensitivity of leptogenesis with flavor effects to low energy leptonic CP violation
Sacha Davidson1, Julia Garayoa, Federica Palorini
1IPN de Lyon, Université Lyon 1, CNRS, 4 rue Enrico Fermi, Villeurbanne, 69622 cedex, France.
Abstract:
If the baryon asymmetry of the Universe is produced by leptogenesis, CP violation is required in the lepton sector. In the seesaw extension of the standard model with three hierarchical right-handed neutrinos, we show that the baryon asymmetry is insensitive to the Pontecorvo-Maki-Nagakawa-Sakata phases: thermal leptogenesis can work for any value of the observable phases. This result was well known when there were no flavor effects in leptogenesis; we show that it remains true when flavor effects are included.
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