Evolution of average multiplicities of quark and gluon jets

Details Evolution of average multiplicities of quark and gluon jets Evolution of average multiplicities of quark and gluon jets

1999-10-04

arxiv.org/abs/hep-ph/9910226v2

Phys.Rev. D61 (2000) 074009

Physics

High Energy Physics

High Energy Physics - Phenomenology

23 pages including 3 figures. Version 2 contains small correction to equation (41)

Scientific paper

10.1103/PhysRevD.61.074009

The energy evolution of average multiplicities of quark and gluon jets is studied in perturbative QCD. Higher order (3NLO) terms in the perturbative expansion of equations for the generating functions are found. First and second derivatives of average multiplicities are calculated. The mean multiplicity of gluon jets is larger than that of quark jets and evolves more rapidly with energy. It is shown which quantities are most sensitive to higher order perturbative and nonperturbative corrections. We define the energy regions where the corrections to different quantities are important. The latest experimental data are discussed.

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