Automatic Peccei-Quinn symmetry

Abstract

We present a dynamical (composite) axion model where the Peccei-Quinn (PQ) symmetry arises automatically as a consequence of chirality and gauge symmetry. The Standard Model is simply extended by a confining and chiral $SU(5)$ gauge symmetry. The PQ symmetry coincides with a $B-L$ symmetry of the exotic sector. The theory is protected by construction from quantum gravitational corrections stemming from operators with mass dimension lower than nine.

28 pages, 2 figures

References in corpus (4)

• An Improved Experimental Limit on the Electric Dipole Moment of the Neutron
• Anomalous solutions to the strong CP problem
• Heavy axion in asymptotically safe QCD
• Wormholes and masses for Goldstone bosons

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