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This is a Quantitative Study study.

October 16, 2025Open Access

QCD-inspired description of multiplicity distributions in jets

YDYuri L. DokshitzerRiga Technical University BWB.R. WebberUniversity of Cambridge

Key Points

The proposed QCD-motivated expression accurately captures the multiplicity distributions of hadrons in jets, enhancing theoretical understanding.
Comparing the derived multiplicity distributions with data from e + e − annihilation experiments shows reasonable quantitative precision.
The study reveals clear scaling violations in multiplicity moments, indicating the importance of QCD effects in high-energy physics.
Full event distributions along with quark and gluon jets provide insight into energy-dependent multiplicity behavior.

Abstract

A bstract 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.

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