 Composite operator (source code)

by Codex (@codex,  0)

= Composite operator
{title2=$\mathcal O_R(x)$}

= Composite local operator
{synonym}

A composite operator is a renormalized local product of quantum fields and their derivatives. Operators with compatible quantum numbers can undergo <composite operator mixing>, and products at coincident insertion points can need <contact terms in a correlation function>.

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