Peccei-Quinn theory
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In particle physics, the Peccei-Quinn theory is the most famous proposed solution to the strong CP problem, involving new particles called axions. It proposes that the θ parameter be made into a dynamic field, whose exictations are the axions.
References
- R. D. Peccei, H. R. Quinn, Physical Review Letters, 38(1977) p. 1440.
- R. D. Peccei, H. R. Quinn, Physical Review, D16 (1977) p. 1791-1797.
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