Naturally light invisible axion and local Z13⊗Z3 symmetries
Abstract
We show that by imposing local Z13⊗Z3 symmetries in an SU(2)⊗U(1) electroweak model we can implement an invisible axion in such a way that (i) the Peccei-Quinn symmetry is an automatic symmetry of the classical Lagrangian, and (ii) the axion is protected from semiclassical gravitational effects. In order to be able to implement such a large discrete symmetry, and at the same time allow a general mixing in each charge sector, we introduce right-handed neutrinos and enlarge the scalar sector of the model. The domain wall problem is briefly considered.
- Publication:
-
Physical Review D
- Pub Date:
- January 2004
- DOI:
- 10.1103/PhysRevD.69.015007
- arXiv:
- arXiv:hep-ph/0210172
- Bibcode:
- 2004PhRvD..69a5007D
- Keywords:
-
- 14.80.Mz;
- 11.30.Er;
- 12.60.Fr;
- Axions and other Nambu-Goldstone bosons;
- Charge conjugation parity time reversal and other discrete symmetries;
- Extensions of electroweak Higgs sector;
- High Energy Physics - Phenomenology;
- Astrophysics;
- High Energy Physics - Theory
- E-Print:
- PQ charges and typos corrected