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Reloading the axion in a 3-3-1 setup
oleh: Alex G. Dias, Julio Leite, José W.F. Valle, Carlos A. Vaquera-Araujo
| Format: | Article |
|---|---|
| Diterbitkan: | Elsevier 2020-11-01 |
Deskripsi
We generalize the idea of the axion to an extended electroweak gauge symmetry setup. We propose a minimal axion extension of the Singer-Valle-Schechter (SVS) theory, in which the standard model fits in SU(3)L⊗U(1)X, the number of families results from anomaly cancellation, and the Peccei-Quinn (PQ) solution to the strong-CP problem is implemented. Neutrino masses arise from a type-I Dirac seesaw mechanism, suppressed by the ratio of SVS and PQ scales, suggesting the existence of new physics at a moderate SVS scale. Novel features include an enhanced axion coupling to photons when compared to the DFSZ axion, as well as flavor-changing axion couplings to quarks.