Trimaximal lepton mixing with a trivial Dirac phase

2009/11/30 by Walter Grimus, W. Grimus, L. Lavoura +2
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Neutrino Physics Research #Particle physics theoretical and experimental studies #hep-ph

paper · pdf · doi:10.1016/j.physletb.2010.02.032

published as Phys.Lett.B686:141-145,2010 · 12 pages, no figures, some clarifications and one reference added, version for publication in Phys. Lett. B

arxiv created 2010/02/11 · openalex publication_date 2010/02/15 · arxiv updated 2010/04/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01

Abstract

We present a model which employs the seesaw mechanism with five right-handed neutrinos, leading to trimaximal and CP-conserving lepton mixing. Tri-bimaximal mixing is a natural limiting case of our model which occurs when one particular vacuum expectation value is real and preserves the μ–τ interchange symmetry of the Lagrangian. Our model allows for leptogenesis even in the case of exact tri-bimaximal mixing.

Citations

• Leptogenesis in seesaw models with a two-fold-degenerate neutrino Dirac mass matrix
• A model realizing the Harrison-Perkins-Scott lepton mixing matrix
• Effect of spatial structure on the evolution of cooperation
• Leptogenesis withoutCPviolation at low energies