  We consider the correlator $\langle \mathcal{L} \mathcal{K} \tilde{
\mathcal{K}} \rangle $ of the Lagrange operator of $\mathcal{N}=4$ super
Yang-Mills theory and two conjugate two-excitation operators in an $su(2)$
sector. We recover the planar one-loop anomalous dimension of the renormalised
operators from this hexagon computation.
