Charged-particle multiplicity distributions inpp,π±p, andK±pcollisions ande+e−andp¯pannihilations

A mixed two-component model is used to fit the available charged-particle multiplicity distribution from $\mathrm{pp}$, ${\pi }^{\pm }p$, and $K^{\pm }p$ collisions and $e^{+}{e}^{-}$ and $\overline{p}p$ annihilations. Generally good agreement is obtained between theory and experiment with respect to the dispersion, and second, third, and fourth normalized moments. Koba-Nielsen-Olesen scaling is seen to hold approximately in this model.