CLAN PROPERTIES IN PARTON SHOWERS

By considering clans as genuine elementary subprocesses, i.e., interme diate parton sources in the Simplified Parton Shower model, a generali zed version of this model is defined. It predicts analytically clan pr operties at parton level in agreement with the general trends observed experimentally at hadronic level and in Monte Carlo simulations both at partonic and hadronic level. In particular the model shows a linear rising in rapidity of the average number of clans at fixed energy of the initial parton and its subsequent bending for rapidity intervals a t the border of phase space, and approximate energy independence of th e average number of clans in fixed rapidity intervals. The energy inde pendence becomes stricter by properly normalizing the average number o f clans.