Average Multiplicities in Gluon and Quark Jets in Higher-Order Perturbative QCD
I.M. Dremin, V.A. Nechitailo (P.N.Lebedev Physical Institute,, Moscow, Russia)
TL;DR
This paper investigates how higher-order perturbative QCD calculations affect the ratio of average multiplicities in gluon and quark jets, leading to better experimental agreement and providing new insights into energy dependence and anomalous dimensions.
Contribution
It presents higher-order QCD calculations of jet multiplicity ratios and anomalous dimensions, improving theoretical predictions and their alignment with experimental data.
Findings
Ratio decreases in higher-order calculations, matching experiments better
Derived energy dependence of mean multiplicities
Calculated QCD anomalous dimension
Abstract
The ratio of average multiplicities in gluon and quark jets is shown to become noticeably smaller in higher-order QCD compared to its lowest order value what improves agreement with experiment. QCD anomalous dimension has been calculated. It has been used to get energy dependence of mean multiplicities.
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