Large lepton flavor mixings in SU(6)×SU(2) model

2000/09/30 by M. Matsuda, Masahisa Matsuda, Takeo Matsuoka · 1 citation
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Neutrino Physics Research #Particle physics theoretical and experimental studies #hep-ph

paper · pdf · doi:10.1016/s0370-2693(01)00044-2

published as Phys.Lett. B499 (2001) 287-296 · 14 pages, no figure typos added, reference added

arxiv created 2000/12/14 · openalex publication_date 2001/02/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

The lepton masses and mixings are studied on the basis of string inspired SU(6)× SU(2)_R model with global flavor symmetries. Provided that sizable mixings between lepton doublets L and Higgsino-like fields H_d with even R-parity occur and that seesaw mechanism is at work in the neutrino sector, the model can yield a large mixing angle solution with tan θ₁₂, tan θ₂₃ = Ø(√ł) (ł= 0.22), which is consistent with the recent experimental data on atmospheric and solar neutrinos. In the solution Dirac mass hierarchies in the neutrino sector cancel out with the heavy Majorana sector in large part due to seesaw mechanism. Hierarchical pattern of charged lepton masses can be also explained.

Citations

• A large Majorana mass from Calabi-Yau superstring models

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