Invisible axion in the hidden sector of no-scale supergravity |
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| Affiliation: | 1. School of Foreign Service, Georgetown University and U.S. Department of State, United States;2. Department of Economics and School of Foreign Service, Georgetown University, United States;1. Department of Epidemiology, Nara Medical University School of Medicine, Nara, Japan;2. Department of General Medicine, Nara Medical University School of Medicine, Nara, Japan |
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| Abstract: | We propose a new axion model which incorporates the U(1)PQ symmetry into a hidden sector, as well as an observable sector, of no-scale supergravity models. The axion is a spin-zero field in the hidden sector. The U(1)PQ symmetry is naturally embedded in the family symmetry of the no-scale models. Invisible axions live in the gravity hidden sector without conflict with the cosmological and astrophysical constraints. |
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