SU(2) gauge theory (source code)

= SU(2) gauge theory
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{title2=$SU(2)$ gauge theory}

An SU(2) gauge theory is a <Yang-Mills theory> with gauge group $SU(2)$. In its defining representation the generators are $T^a=\sigma^a/2$, and its structure constants are the Levi-Civita symbols $\epsilon^{abc}$.