Stabilizing the axion by discrete gauge symmetries

Dec, 2002
14 pages
Published in:
  • Phys.Lett.B 560 (2003) 214-222
e-Print:
Report number:
  • OSU-HEP-02-18

Citations per year

200320092015202120250123456
Abstract:
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.
  • strong interaction: CP
  • symmetry: U(1)
  • axion: stability
  • quantum gravity: correction
  • symmetry: gauge
  • symmetry: discrete
  • symmetry: Z(N)
  • anomaly: gauge
  • supersymmetry: symmetry breaking
  • mu-problem