QCD-inspired description of multiplicity distributions in jets

TL;DR

This paper proposes a universal QCD-inspired model for hadron multiplicity distributions in jets, successfully describing experimental data and revealing QCD-predicted scaling violations across various energies.

Contribution

It introduces a new universal expression for multiplicity distributions in jets based on QCD principles, aligning well with experimental observations.

Findings

Model accurately fits data from $e^+e^-$ experiments

Scaling violations predicted by QCD are observed in data

High-multiplicity fluctuations are well described

Abstract

We suggest a universal QCD-motivated expression for the Polyakov-KNO multiplicity distributions of hadrons in jets and compare it with data from $e^+e^-$ annihilation experiments. The moments and overall shape of the distributions in full events and quark and gluon jets, over a range of energies, are described with reasonable quantitative precision. In particular, the scaling violation predicted by QCD is seen clearly in the moments and high-multiplicity fluctuations.