Multiplicity spectra in e+e− and p¯p collisions in terms of Tsallis and Weibull distributions

Abstract

Charged hadron production in the [Formula: see text] annihilations at 91 to 206[Formula: see text]GeV in full phase space and in [Formula: see text] collisions at 200 to 900[Formula: see text]GeV collision energies are studied using nonextensive Tsallis and stochastic Weibull probability distributions. The Tsallis distribution shows better description of the data than the Weibull distribution. The 2-jet modification of the statistical distribution is applied to describe [Formula: see text] data. The main features of these distributions can be described by a two-component model with soft, collective interactions at low transverse energy and hard, constituent interactions dominating at high transverse energy. This modification is found to give much better description than a full-sample fit, and again Tsallis function is found to better describe the data than the Weibull one pointing at the nonextensive character of the multiparticle production process.