We discuss high-pT production of particle pairs, comparing the "higher-twist" constituent-interchange-model (CIM) subprocesses to the most "elementary" [quantum chromodynamics (QCD)] subprocesses. All aspects of spectra scaling laws and charge and quantum-number correlations are discussed. Comparison with existing data is given. In general, we find that meson pairs at moderate pT receive contributions from a mixture of QCD and CIM subprocesses; the strongest evidence for the CIM contributions comes from substantial charge correlations observed in several experiments. For pairs involving baryons, especially pp̄, CIM should be dominant at moderate pT with consequent large correlations and strong inverse-pT damping.
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Gunion et al. (1980) studied this question.
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