Evolution of average multiplicities of quark and gluon jets
High Energy Physics - Phenomenology
2009-10-31 v2
Abstract
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.
Keywords
Cite
@article{arxiv.hep-ph/9910226,
title = {Evolution of average multiplicities of quark and gluon jets},
author = {A. Capella and I. M. Dremin and J. W. Gary and V. A. Nechitailo and J. Tran Thanh Van},
journal= {arXiv preprint arXiv:hep-ph/9910226},
year = {2009}
}
Comments
23 pages including 3 figures. Version 2 contains small correction to equation (41)