Two-particle correlations in e+e- jets from QCD

Two-particle correlation functions are introduced which vanish in the naive quark-parton model (zeroth order QCD) and directly measure higher order QCD corrections, i.e., three- (or more) jet final states. They have the advantage over a multi-jet analysis in spherocity, thrust and acoplanarity (i) to be insensitive to heavy quark-antiquark pair production and (ii) to be easy to measure. Detailed predictions for two-particle correlations are presented. (orig.)