单词	axion
释义	axion /ˈaksɪɒn / noun Physics A hypothetical subatomic particle postulated to account for the rarity of processes which break charge-parity symmetry.Or another candidate is an even more exotic particle called the axion.... This has helped to promote particle-DM, with candidates such as axions, neutralinos and other cold DM particles, as well as warm DM, and self-interacting DM, whose nature is not even specified. Axions, if they exist at all, do so in our ordinary dimensions, but they are stable neutral particles. Origin 1970s: from axial + -on.
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