Artigo
Naturally light invisible axion in models with large local discrete symmetries
Fecha
2003-05-01Registro en:
Physical Review D. College Pk: American Physical Soc, v. 67, n. 9, 7 p., 2003.
0556-2821
10.1103/PhysRevD.67.095008
WOS:000183313000049
WOS000183313000049.pdf
6783433390235727
0000-0001-5279-8438
Autor
Universidade de São Paulo (USP)
Universidade Estadual Paulista (Unesp)
Ctr Tecn Aeroesp
Resumen
We show that by introducing appropriate local Z(N)(Ngreater than or equal to13) symmetries in electroweak models it is possible to implement an automatic Peccei-Quinn symmetry, at the same time keeping the axion protected against gravitational effects. Although we consider here only an extension of the standard model and a particular 3-3-1 model, the strategy can be used in any kind of electroweak model. An interesting feature of this 3-3-1 model is that if we add (i) right-handed neutrinos, (ii) the conservation of the total lepton number, and (iii) a Z(2) symmetry, the Z(13) and the chiral Peccei-Quinn U(1)P-Q symmetries are both accidental symmetries in the sense that they are not imposed on the Lagrangian but are just a consequence of the particle content of the model, its gauge invariance, renormalizability, and Lorentz invariance. In addition, this model has no domain wall problem.