Behaviour of semi-inclusive sphericity distributions and a two-component uncorrelated cascade model

A simple two component uncorrelated cascade model is proposed which reproduces the semi-inclusive Sphericity distributions observed in low psub(T) hadron-hadron collisions. It is pointed out that if α is an exponential parameter inserted into the quark-quark structure function, the S dependence of the semi-inclusive sphericity distribution for multiplicity n goes as exp(-α/n S). This conclusion agrees extremely well with the experimental data. (orig.)