Multiplicity correlations between neutral and charged pions from charged multiplicity distributions (for pion-proton and proton-proton collisions)

It is shown that for several simple possibilities of distributing charge between pions (the so-called pi , epsilon and rho models) the ( pi /sup 0/ pi /sup ch/) multiplicity correlations can be expressed directly in terms of the charged multiplicity distributions. Each of the models can then be tested experimentally, irrespectively of the unknown total multiplicity distribution. (4 refs).