paper

The strong-CP question in SU(3)_c X SU(3)_L X U(1)_N models

arXiv:hep-ph/9411406 · doi:10.1103/PhysRevD.52.1659

Abstract

We analyze two recent models based on the gauge group SU(3)SU(3)U(1) where each generation is not anomaly-free, but anomaly cancels when three generations are taken into account. We show that the most general Yukawa couplings of these models admit of a Peccei-Quinn symmetry. This symmetry can be extended to the entire Lagrangian by using extra fields in a very elegant way so that the resulting axion can be made invisible.

Latex, 8 pages, no figures

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