  We present a method for calculating event shapes in QCD based on correlation
functions of conserved currents. The method has been previously applied to the
maximally supersymmetric Yang-Mills theory, but we demonstrate that
supersymmetry is not essential. As a proof of concept, we consider the simplest
example of a charge-charge correlation at one loop (leading order). We compute
the correlation function of four electromagnetic currents and explain in detail
the steps needed to extract the event shape from it. The result is compared to
the standard amplitude calculation. The explicit four-point correlation
function may also be of interest for the CFT community.
