Publicação: Discrete symmetries, invisible axion, and lepton number symmetry in an economic 3-3-1 model
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We show that Peccei-Quinn and lepton number symmetries can be a natural outcome in a 3-3-1 model with right-handed neutrinos after imposing a [Formula Presented] symmetry. This symmetry is suitably accommodated in this model when we augment its spectrum by including merely one singlet scalar field. We work out the breaking of the Peccei-Quinn symmetry, yielding the axion, and study the phenomenological consequences. The main result of this work is that the solution to the strong CP problem can be implemented in a natural way, implying an invisible axion phenomenologically unconstrained, free of domain wall formation, and constituting a good candidate for the cold dark matter. © 2003 The American Physical Society.
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Physical Review D - Particles, Fields, Gravitation and Cosmology, v. 68, n. 11, 2003.
