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Besides the forces of electromagnetism and gravity there are two more fundamental gauge fields in the standard model of particle physics.
The weak nuclear force is described by a gauge field with gauge group the special unitary group $SU(2)$ (Wboson, Zboson). It controls aspects of the beta decay.
The strong nuclear force is described by a gauge field with gauge group the special unitary group $SU(3)$ (QCD (gluon). It governs the interaction between quarks.
Wikipedia, Weak interaction
Wikipedia, Strong interaction
Last revised on May 16, 2014 at 11:53:45. See the history of this page for a list of all contributions to it.