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29 March 2024
 
  » arxiv » hep-ph/0301271

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Neutrino Masses in a 5D $SU(3)_W$ TeV Unification Model
Chia-Hung V. Chang ; We-Fu Chang ; John N. Ng ;
Date 30 Dec 2002
Journal Phys.Lett. B558 (2003) 92-102 DOI: 10.1016/S0370-2693(03)00219-3
Subject hep-ph
AffiliationNational Taiwan Normal University), We-Fu Chang and John N. Ng (TRIUMF
AbstractWe study the generation of neutrino masses in the $SU(3)_W$ electroweak unified theory in $M_4 imes S_1/(Z_2 imes Z’_2)$ spacetime. By appropriate orbifolding, the bulk symmetry $SU(3)_W$ is broken into $SU(2)_L imes U(1)_Y$ 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 $mu a 3e$ transition and neutrinoless double beta decays are discussed.
Source arXiv, hep-ph/0301271
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