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- W1968984039 endingPage "89" @default.
- W1968984039 startingPage "1" @default.
- W1968984039 abstract "Abstract The strong CP -violating θ parameter, the problem of strong CP violation and their status are reviewed. Among all possibilities, two natural solutions to the strong CP puzzle are thoroughly discussed and emphasized: the axion-type mechanism for hard CP violation and the non-Peccei-Quinn scheme for spontaneous CP nonconservation. Basic properties of the axion are derived from the modified Peccei-Quinn symmetry. Astrophysical and cosmological constraints are described for two different types of invisible axions. In nonaxion solutions, CP is spontaneously broken at the grand-unification scale and the CP phase is transmitted down to the low energy sector by quantum effects or by fermion mixing effects. As a by-product, the cosmological baryon asymmetry, which is caused by the same source of CP violation ultimately responsible for the kaon e parameter, is generated adequately at the one-loop level." @default.
- W1968984039 created "2016-06-24" @default.
- W1968984039 creator A5001877298 @default.
- W1968984039 date "1988-01-01" @default.
- W1968984039 modified "2023-10-17" @default.
- W1968984039 title "The strong CP problem revisited" @default.
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