Axion
An axion is a elementary particle theorized in 1977 by the Peccei–Quinn theory. It was used to solve the strong CP problem in quantum chromodynamics (QCD). If these axions do exist in a specific mass range, they could be a possible part of cold dark matter. There is also evidence of solar axions (axions from the Sun). Also if these axions exist there is evidence that they can go faster than the speed of light.
| Interactions | Gravity, electromagnetic |
|---|---|
| Status | Hypothetical |
| Symbol | A0 |
| Theorized | 1977, Peccei and Quinn |
| Mass | 10−5 to 10−3 eV/c2 [1] |
| Electric charge | 0 |
| Spin | 0 |
References
- Peccei, R. D. (2008). "The Strong CP Problem and Axions". In Kuster, Markus; Raffelt, Georg; Beltrán, Berta (eds.). Axions: Theory, Cosmology, and Experimental Searches. Lecture Notes in Physics. Vol. 741. pp. 3–17. arXiv:hep-ph/0607268. doi:10.1007/978-3-540-73518-2_1. ISBN 978-3-540-73517-5. S2CID 119482294.
| Forms of dark matter |
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| Hypothetical particles |
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| Theories and objects |
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| Search experiments |
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| Potential dark galaxies |
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