A holographic perspective on the axion quality problem
- Univ. of Melbourne (Australia). School of Physics; Univ. of Tokyo (Japan). Kavli Institute for the Physics and Mathematics of the Universe (WPI); OSTI
- Univ. of Minnesota, Minneapolis, MN (United States). School of Physics and Astronomy
The axion provides a compelling solution to the strong CP problem as well as a candidate for the dark matter of the universe. However, the axion solution relies on the spontaneous breaking of a global U(1)P Q symmetry, which is also explicitly violated by quantum gravity. To preserve the axion solution, gravitational violations of the U(1)P Q symmetry must be suppressed to sufficiently high order. We present a simple, geometric solution of the axion quality problem by modelling the axion with a bulk complex scalar field in a slice of AdS5, where the U(1)P Q symmetry is spontaneously broken in the bulk but explicitly broken on the UV brane. By localising the axion field towards the IR brane, gravitational violations of the PQ symmetry on the UV brane are sufficiently sequestered. This geometric solution is holographically dual to 4D strong dynamics where the global U(1)P Q is an accidental symmetry to sufficiently high order.
- Research Organization:
- Univ. of Minnesota, Minneapolis, MN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- SC0011842
- OSTI ID:
- 1802268
- Journal Information:
- Journal of High Energy Physics (Online), Journal Name: Journal of High Energy Physics (Online) Journal Issue: 1 Vol. 2020; ISSN 1029-8479
- Publisher:
- Springer BerlinCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Composite Froggatt-Nielsen model of flavor
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