What is Axion?
{{Infobox particle | name = Axion | composition = | status = Hypothetical | interaction = [[Gravity]], [[Electromagnetic force|electromagnetic]] | theorized = 1977, [[Roberto Peccei|Peccei]] and [[Helen Quinn|Quinn]] | symbol = A<sup>0</sup> | mass = 10<sup>−5</sup> to 10<sup>−3</sup>&nbsp;[[electronvolt|eV]]/[[Speed of light|''c'']]<sup>2</sup>{{spaces|1}}<ref>{{Cite book|author=Peccei, R. D. |year=2008 |chapter=The Strong CP Problem and Axions |title=Axions: Theory, Cosmology, and Experimental Searches |journal=<!-- -->|editor1-last=Kuster |editor1-first=Markus |editor2-last=Raffelt |editor2-first=Georg |editor3-last=Beltrán |editor3-first=Berta |series=Lecture Notes in Physics |volume=741 |pages=3–17 |arxiv=hep-ph/0607268 |doi=10.1007/978-3-540-73518-2_1 |isbn=978-3-540-73517-5|s2cid=119482294 }}</ref> | width=10<sup>9</sup> to 10<sup>12</sup> [[GeV]]/c<sup>2</sup> <ref>{{cite journal |author=Duffy, Leanne D. |author2=van Bibber, Karl |year=2009 |title=Axions as dark matter particles |journal=New Journal of Physics |volume=11 |issue=10 |page=105008 |doi=10.1088/1367-2630/11/10/105008 |arxiv=0904.3346 |bibcode=2009NJPh...11j5008D|s2cid=17212949 }}</ref><ref name=Duffy2010/> | electric_charge = 0 | spin = 0 | Grouping = [[Goldstone Boson]] }} 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. == References == {{reflist}} {{Dark matter}} {{physics-stub}} [[Category:Astrophysics]] [[Category:Elementary particles]] [[Category:Quantum mechanics]]