Editing ATLAS experiment (section)

====Supersymmetry====
Most of the currently proposed theories predict new higher-mass particles, some of which may be light enough to be observed by ATLAS. Models of [[supersymmetry]] involve new, highly massive particles. In many cases these decay into high-energy [[quark]]s and stable heavy particles that are very unlikely to interact with ordinary matter. The stable particles would escape the detector, leaving as a signal one or more high-energy [[jet (particle physics)|quark jets]] and a large amount of [[missing energy|"missing"]] [[momentum]]. Other hypothetical massive particles, like those in the [[Kaluza–Klein theory]], might leave a similar signature. 
The data collected up to the end of LHC Run II do not show evidence of supersymmetric or unexpected particles, the research of which will continue in the data that will be collected from Run III onwards.