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arXiv · 1510.00302

The simplest 3-3-1 model

Le Tho Hue·Le Duc Ninh
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Abstract

A simple extension of the Standard Model (SM), based on the gauge group $SU(3)_C\otimes SU(3)_L\otimes U(1)_Y$ with $Y$ being the hypercharge, is considered. We show that, by imposing an approximate global $SU(2)_L\times SU(2)_R$ custodial symmetry at the SM energy scale, the $Z-Z'$ mixing is absent at tree level and the value of the $ρ$ parameter can be kept close to one. Tree-level flavor-changing neutral currents are also reduced to three particles, namely $Z'$, a CP-odd Higgs and a CP-even Higgs. The model predicts new leptons with electric charges of $\pm 1/2e$ and new quarks with $\pm 1/6e$ charges as well as new gauge and scalar bosons with $\pm 1/2e$ charges. Electric charge conservation requires that one of them must be stable. Their masses are unfortunately free parameters.

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Le Tho Hue, Le Duc Ninh. 2016-03-29. The simplest 3-3-1 model. https://doi.org/10.1142/s0217732316500620

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