Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2002-12-23
Phys.Lett. B560 (2003) 214-222
Physics
High Energy Physics
High Energy Physics - Phenomenology
14 pages LateX
Scientific paper
10.1016/S0370-2693(03)00411-8
The axion solution to the strong CP problem makes use of a global Peccei-Quinn U(1) symmetry which is susceptible to violations from quantum gravitational effects. We show how discrete gauge symmetries can protect the axion from such violations. PQ symmetry emerges as an approximate global symmetry from discrete gauge symmetries. Simple models based on Z_N symmetries with N =11,12, etc are presented realizing the DFSZ axion and the KSVZ axion. The discrete gauge anomalies are cancelled by a discrete version of the Green-Schwarz mechanism. In the supersymmetric extension our models provide a natural link between the SUSY breaking scale, the axion scale, and the SUSY-preserving \mu term.
Babu K. S.
Gogoladze Ilia
Wang Kai
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