### Abstract

We study the generation of neutrino masses in the SU(3)_{W} electroweak unified theory in M_{4} x S_{1}/(Z_{2} x Z_{2}′) spacetime. By appropriate orbifolding, the bulk symmetry SU(3)_{W} is broken into SU(2)_{L} x U(1)_{Y} at one of the fixed points, where the quarks reside. The leptons form SU(3)_{W} triplets, localized at the other symmetric fixed point. The fermion masses arise from the bulk Higgs sector containing a triplet and an anti-sextet. We construct neutrino Majorana masses via 1-loop quantum corrections by adding a parity odd bulk triplet scalar. No right-handed neutrino is needed. The neutrino mass matrix is of the inverted hierarchy type. We show that the model can easily accommodate the bi-large mixing angle solution favored by the recent neutrino experiments without much fine tuning of parameters. The constraints from μ → 3e transition and neutrinoless double β decays are discussed. Crown copyright

Original language | English |
---|---|

Pages (from-to) | 92-102 |

Number of pages | 11 |

Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |

Volume | 558 |

Issue number | 1-2 |

DOIs | |

Publication status | Published - 2003 Apr 10 |

### Fingerprint

### ASJC Scopus subject areas

- Nuclear and High Energy Physics

### Cite this

_{W}TeV unification model.

*Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics*,

*558*(1-2), 92-102. https://doi.org/10.1016/S0370-2693(03)00219-3