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          Institute: MPI für Physik     Collection: MPI für Physik     Display Documents



ID: 543854.0, MPI für Physik / MPI für Physik
Colour reconnection in e+e- -> W+W- at sqrt(s) = 189 - 209 GeV
Authors:The OPAL Collaboration; Abbiendi, G.
Date of Publication (YYYY-MM-DD):2006
Title of Journal:European Physical Journal C
Journal Abbrev.:Eur.Phys.J.C
Issue / Number:45
Start Page:291
End Page:305
Audience:Not Specified
Intended Educational Use:No
Abstract / Description:The effects of the final state interaction phenomenon known as colour reconnection are investigated at centre-of-mass energies in the range sqrt(s) ~ 189-209 GeV using the OPAL detector at LEP. Colour reconnection is expected to affect observables based on charged particles in hadronic decays of W+W-. Measurements of inclusive charged particle multiplicities, and of their angular distribution with respect to the four jet axes of the events, are used to test models of colour reconnection. The data are found to exclude extreme scenarios of the Sjostrand-Khoze Type I (SK-I) model and are compatible with other models, both with and without colour reconnection effects. In the context of the SK-I model, the best agreement with data is obtained for a reconnection probability of 37%. Assuming no colour reconnection, the charged particle multiplicity in hadronically decaying W bosons is measured to be (nqqch) = 19.38+-0.05(stat.)+-0.08 (syst.).
Classification / Thesaurus:OPAL
Comment of the Author/Creator:30 pages, 9 figures, Submitted to Euro. Phys. J. C
External Publication Status:published
Document Type:Article
Communicated by:N.N.
Affiliations:MPI für Physik
Identifiers:LOCALID:MPP-2005-189
URL:http://www.slac.stanford.edu/spires/find/hep/www?r...
URL:http://arXiv.org/abs/hep-ex/0508062
URL:http://publications.mppmu.mpg.de/?action=search&mp...
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