Lancaster EPrints

Measurements of the structure of quark and gluon jets in hadronic Z decays

ALEPH Collaboration, The and Barate, R. and Betteridge, Andrew and Bowdery, Christopher and Colrain, Paul and Finch, Alexander and Foster, Frank and Hughes, Gareth and Jones, Roger and Williams, Mark (2000) Measurements of the structure of quark and gluon jets in hadronic Z decays. European Physical Journal C: Particles and Fields, 17 (1). pp. 1-18. ISSN 1434-6044

Full text not available from this repository.

Abstract

An experimental investigation of the structure of identified quark and gluon jets is presented. Observables related to both the global and internal structure of jets are measured; this allows for tests of QCD over a wide range of transverse momentum scales. The observables include distributions of jet-shape variables, the mean and standard deviation of the subjet multiplicity distribution and the fragmentation function for charged particles. The data are compared with predictions of perturbative QCD as well as QCD-based Monte Carlo models. In certain kinematic regions the measurements are sensitive mainly to perturbatively calculable effects, allowing for a test of QCD. The comparisons are also extended into regions where nonperturbative effects become large, and in this way the transition from hard to soft QCD is investigated. It is found that by including leading and next-to-leading logarithmic contributions in the QCD predictions, the agreement with the data can be extended to lower transverse momentum scales, especially for gluon jets.

Item Type: Article
Journal or Publication Title: European Physical Journal C: Particles and Fields
Subjects:
Departments: Faculty of Science and Technology > Physics
ID Code: 63991
Deposited By: ep_importer_pure
Deposited On: 08 May 2013 11:25
Refereed?: Yes
Published?: Published
Last Modified: 21 Sep 2017 05:35
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/63991

Actions (login required)

View Item