what is a axion????????????
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The axion (/ˈæksiɒn/) is a hypothetical elementary particle postulated by the Peccei–Quinn theory in 1977 to resolve the strong CP problem in quantum chromodynamics (QCD). If axions exist and have low mass within a specific range, they are of interest as a possible component of cold dark matter.
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A hypothetical subatomic particle postulate to account for the rarity of processes which break charge- parity symmetry.
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