2018/11/30 by Hye-Sung Lee, Hye‐Sung Lee, Wen Yin · 1 citation
Physics and Astronomy · #Axion #Baryon #Dark Matter and Cosmic Phenomena #Gauge group #Gauge theory #Geometry #Global symmetry #Hadron #Neutrino Physics Research #Particle physics #Particle physics theoretical and experimental studies #Physics #Proton decay #Quark #Spontaneous symmetry breaking #Supersymmetry #Symmetry (geometry) #Symmetry breaking #Symmetry group #hep-ph
paper · pdf · doi:10.1103/physrevd.99.015041
published as Phys. Rev. D 99, 015041 (2019) · 6 pages, no figures; v2:Version to appear in PRD
arxiv created 2019/01/25 · openalex publication_date 2019/01/31 · arxiv updated 2019/02/06 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We introduce a natural origin of the Peccei-Quinn (PQ) symmetry with a sufficiently good precision. In the standard model, the baryon number symmetry U(1)B arises accidentally due to the SU(3)C color gauge symmetry, and it protects the proton from a decay at a sufficient level. Likewise, if there is an SU(N) gauge symmetry in the hidden sector, an accidental hidden baryon number symmetry U(1)_BH can appear. The hidden baryon number is solely obtained by the structure of the SU(N) group. In particular, the quality of the U(1)_BH can be arbitrarily good for an asymptotically-free theory with large enough N. The U(1)_BH can be identified as a PQ symmetry. Using our findings, we build two types of novel composite axion models: a model where only one SU(N) gauge symmetry is required to both guarantee the quality and break the U(1)_BH, and a model with SU(N)\ifmmode×\else\texttimes\fiSU(M) gauge symmetry where the exotic quarks responsible to the axion-gluon coupling do not confine into exotic hadrons through the dynamical breaking of the PQ symmetry, and have masses of TeV scales.