DELPHI Collaboration, The and Borissov, Guennadi V. and Sopczak, A. (2005) Charged particle multiplicity in three-jet events and two-gluon systems. European Physical Journal C: Particles and Fields, 44 (3). pp. 311-331. ISSN 1434-6044
Full text not available from this repository.Abstract
The charged particle multiplicity in hadronic three-jet events from Z decays is investigated. The topology dependence of the event multiplicity is found to be well described by a modified leading logarithmic prediction. A parameter fit of the prediction to the data yields a measurement of the colour factor ratio CA/CF with the result CA/CF = 2.261 ± 0.014stat. ± 0.036exp. ± 0.066theo. in agreement with the SU(3) expectation of QCD. The quark-related contribution to the event multiplicity is subtracted from the three-jet event multiplicity resulting in a measurement of the multiplicity of twogluon colour-singlet states over a wide energy range. The ratios r = Ngg(s)/Nq¯q(s) of the gluon and quark multiplicities and r(1) = N gg(s)/Nq ¯q(s) of their derivatives are compared with perturbative calculations. While a good agreement between calculations and data is observed for r(1), larger deviations are found for r indicating that non-perturbative effects are more important for r than for r(1).
| Item Type: | Article |
|---|---|
| Journal or Publication Title: | European Physical Journal C: Particles and Fields |
| Additional Information: | Author list is partial - see original article for full author list. |
| Subjects: | Q Science > QC Physics |
| Departments: | Faculty of Science and Technology > Physics |
| ID Code: | 10045 |
| Deposited By: | Ms Margaret Calder |
| Deposited On: | 27 Jun 2008 16:04 |
| Refereed?: | Yes |
| Published?: | Published |
| Last Modified: | 26 Jul 2012 14:42 |
| Identification Number: | |
| URI: | http://eprints.lancs.ac.uk/id/eprint/10045 |
Actions (login required)
| View Item |
