Factorial and Cumulant Moments in $e^{+}{e}^{-}\to$ Hadrons at the Z${}^0$ Resonance

Abstract

We present the first experimental study of the ratio of cumulant to factorial moments of the charged-particle multiplicity distribution in high-energy particle interactions, using hadronic Z${}^0$ decays collected by the SLD experiment at SLAC. We find that this ratio, as a function of the moment-rank $q$, decreases sharply to a negative minimum at $q=5$, which is followed by quasi-oscillations. These features are insensitive to experimental systematic effects and are in qualitative agreement with expectations from next-to-next-to-leading-order perturbative QCD.

13 pages, latex file, uuencoded eps figures

References in corpus (2)

• Measurement of alpha_s(M_Z^2) from Hadronic Event Observables at the Z^0 Resonance
• Properties of Factorial Cumulant to Factorial Moment Ratio

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