On interference correlations in a ''resonance plus particle'' system

The correlations in a three-particle system are considered in the case when two of the particles are the resonance decay products, and when the third particle and resonance are produced independently in different space-time points. It is shown that in such processes, besides the usual correlations of like particles, there appear the correlations between unlike particles and also between the particle and the resonance. The character of these correlations is determined by the resonance decay range as well as by the dimension of the particle production region.