Astrophysics (Index)About

axion

(A0)
(proposed light, electrically neutral elementary particle)

An axion is a proposed elementary particle, which would explain some experimental results in particle theory, and could comprise cold dark matter. The axion was theorized in 1977 to fill out the standard model of particle physics to resolve the strong CP problem, i.e., explaining why the strong force never violates CP symmetry, a symmetry which is never seen violated, but no reason is known why. The would be a cold dark matter candidate if they exist and have mass. Some fuzzy dark matter models suggest dark matter (or some of it) consists of ultra-light axions, orders-of-magnitude less massive than any known particle.


(physics,particle,model,dark matter,theory)
Further reading:
http://en.wikipedia.org/wiki/Axion
http://en.wikipedia.org/wiki/Axion_Dark_Matter_Experiment
https://ui.adsabs.harvard.edu/abs/2009NJPh...11j5008D/abstract

Referenced by pages:
CMBFAST
dark matter
fuzzy dark matter (FDM)

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