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A high quality composite axion
- Source :
- Journal of High Energy Physics, Vol 2018, Iss 11, Pp 1-19 (2018)
- Publication Year :
- 2018
- Publisher :
- SpringerOpen, 2018.
-
Abstract
- Abstract The strong CP problem is a compelling motivation for physics beyond the Standard Model. The most popular solutions invoke a global U(1)PQ symmetry, but are challenged by quantum gravitational corrections which are thought to be incompatible with global symmetries, arguing that realistic theories contain additional structure. We explore a construction in which the U(1)PQ symmetry is protected to arbitrary order by virtue of a supersymmetric, confining SU(N) L × SU(N) × SU(N) R × U(1) X product gauge group, achieving θ ¯ $$ \left|\overline{\uptheta}\right| $$ < 10−11 for an SU(5) model with f a ≲ 3 × 1011 GeV. This construction leads to low energy predictions such as a U(1) X gauge symmetry, and for X = B − L engineers a naturally O $$ \mathcal{O} $$ (TeV) value for the μ parameter of the MSSM.
Details
- Language :
- English
- ISSN :
- 10298479
- Volume :
- 2018
- Issue :
- 11
- Database :
- Directory of Open Access Journals
- Journal :
- Journal of High Energy Physics
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.6f2664e9fa38458fb8b90884f3ff8d88
- Document Type :
- article
- Full Text :
- https://doi.org/10.1007/JHEP11(2018)199