Dias, A. G.Pleitez, V2014-05-202014-05-202004-04-01Physical Review D. College Pk: American Physical Soc, v. 69, n. 7, 4 p., 2004.0556-2821http://hdl.handle.net/11449/23141By introducing local Z(N) symmetries with N=11,13 in two 3-3-1 models, it is possible to implement an automatic Peccei-Quinn symmetry, keeping the axion protected against gravitational effects at the same time. Both models have a Z(2) domain wall problem and the neutrinos are strictly Dirac particles.4engArtigo10.1103/PhysRevD.69.077702WOS:000221253900093Acesso abertoWOS000221253900093.pdf67834333902357270000-0001-5279-8438