$S{U}_L(4)\times U(1)$ model for electroweak unification and sterile neutrinos

Abstract

Some of basic problems in neutrino physics such as new energy scales, the enormous gap between neutrino masses and the lightest charged fermion mass, possible existance of sterile neutrinos in eV mass range are studied in the local gauge group $S{U}_L(4)\times U(1)$ for electroweak unification, which does not contain fermions with exotic electric charges. It is shown that neutrino mass spectrum can be decoupled from that of the other fermions. Further normal seesaw mechanism for neutrinos, with right handed neutrino Majorana masses to be of order $M\gg M_{\text{weak}}$ as well a new eV-scale can be accomodated. The eV-scale seesaw may manifest itself in experiments like Liquid Scintilation Neutrino Detector (LSND) and MiniBooNE (MB) experimental results and future neutrino experiments.

arXiv comment13 pages

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• Canonical Seesaw Mechanism in Electro-Weak SU(4)L x U(1)Y Models
• Phenomenology of a three-family model with gauge symmetry SU(3)_c X SU(4)_L X U(1)_X
• Exotic Leptons: Collider and Muon Magnetic Moment Constraints
• Neutral currents in a $SU(4{)}_L\otimes U(1{)}_Y$ gauge model with exotic electric charges
• One-loop expressions for $h\to l\bar{l}\gamma$ in Higgs extensions of the Standard Model
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• Weak charges in $SU(5{)}_L\times U(1{)}_Y$ gauge models
• Electroweak unification of quarks and leptons in a gauge group $S{U}_C(3)\times SU(4)\times U_X(1)$
• Weak charges quantization in $SU(3{)}_c\otimes SU(n{)}_L\otimes U(1{)}_Y$ gauge models
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• A new anomaly free flipped 341 model
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• General one-loop formulas for $H\to f\bar{f}\gamma$ and its applications