Neutrino Democracy And Other Phenomenology From 5D SO(10)

Details Neutrino Democracy And Other Phenomenology From 5D SO(10) Neutrino Democracy And Other Phenomenology From 5D SO(10)

2003-03-18

arxiv.org/abs/hep-ph/0303150v3

Nucl.Phys. B665 (2003) 469-486

Physics

High Energy Physics

High Energy Physics - Phenomenology

Version to appear in Nucl. Phys. B

Scientific paper

10.1016/S0550-3213(03)00489-9

We present a five dimensional supersymmetric SO(10) model compactified on an orbifold $S^{(1)}/Z_2\tm Z_2'$. The gauge symmetry $G_{422}\equiv SU(4)_c\tm SU(2)_L\tm SU(2)_R$, realized on one of the fixed points (branes), is spontaneously broken to the MSSM via the higgs mechanism. Employing a flavor ${\cal U}(1)$ symmetry and suitably extending the 'matter' sector enables us to understand large mixings in the neutrino sector via a democratic approach, versus the small CKM mixings. A residual ${\cal R}$-symmetry on $G_{422}$ brane helps eliminate the troublesome dimension five nucleon decay, while the ${\cal U}(1)$ symmetry plays an essential role in suppressing dimension six decay. For rare leptonic decays we expect ${\rm BR}(\mu \to e\ga)\sim {\rm BR}(\tau \to \mu \ga)\sim {\rm BR}(\tau \to e\ga)$.

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