Charged- and Neutral-Particle Correlations at the Critical Point

Motivated by the gas-liquid analog, a critical-point theory for charged multiplicities is generalized to describe the production of more than one type of final-state particle. The distribution in the total number is independent of the number of types created. As a specific application, a theory for charged and neutral particles results. It is found that the theory accounts for the observed linear rise of the mean number of neutrals En₀|nch versus the number of charged particles nch. An extension to neutral-K production is given and it is found that EnK⁰|nchEn₀|nch is independent of nch.