Cumulant to Factorial Moment Ratio and Multiplicity Distributions

G. Gianini; I. M. Dremin; V. A. Nechitailo; B. B. Levchenko; V. Arena; G. Boca; S. Malvezzi; M. Merlo; S. P. Ratti; C. Riccardi; G. Salvadori; L. Viola; P. Vitulo

arXiv · hep-ph/9312299

Cumulant to Factorial Moment Ratio and Multiplicity Distributions

G. Gianini·I. M. Dremin·V. A. Nechitailo·B. B. Levchenko·V. Arena·G. Boca·S. Malvezzi·M. Merlo·S. P. Ratti·C. Riccardi·G. Salvadori·L. Viola·P. Vitulo

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Abstract

The ratio of cumulant to factorial moments of multiplicity distribu- tions has been calculated for e+e- and hh data in a wide range of energies. As a function of the rank it exhibits a regular behaviour with a steep descent and two negative minima. This behaviour is not accounted for by NBD, that leads to a monotonically decreasing positive-defined ratio. A rough comparison with QCD predictions is done: data cannot be accounted for by LLA nor by DLA; only some next-to-next to leading predictions are in qualitative agreement with them. Such features being appropriate for hard processes and high energies, it is a surpri- se to find them not only in e+e- annihilation, but also in soft hh collisions.

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G. Gianini, I. M. Dremin, V. A. Nechitailo, B. B. Levchenko, V. Arena, G. Boca, S. Malvezzi, M. Merlo, S. P. Ratti, C. Riccardi, G. Salvadori, L. Viola, P. Vitulo. 1993-12-16. Cumulant to Factorial Moment Ratio and Multiplicity Distributions. https://arxiv.org/abs/hep-ph/9312299

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