= Operator basis in effective field theory
= Operator bases in effective field theory
{synonym}
An <operator basis in effective field theory> is an independent set of allowed <local field operators> at a chosen order, modulo relevant algebraic identities, <integration by parts> and permitted <field redefinitions>. <Redundant operators> can be removed without changing on-shell amplitudes, provided their coefficient shifts are accounted for. The basis depends on the light fields and symmetries.
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