Coherent Soft Particle Production in Z Decays into Three Jets

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dc.creatorThe DELPHI Collaboration
dc.creatorAbdallah, J.
dc.date2004-10-25
dc.date.accessioned2026-07-07T11:57:57Z
dc.date.available2026-07-07T11:57:57Z
dc.descriptionLow-energy particle production perpendicular to the event plane in three-jet events produced in Z decays in e+e- annihilation is measured and compared to that perpendicular to the event axis in two-jet events. The topology dependence of the hadron production ratio is found to agree with a leading-order QCD prediction. This agreement and especially the need for the presence of a destructive interference term gives evidence for the coherent nature of gluon radiation. Hadron production in three-jet events is found to be directly proportional to a single topological scale function of the inter-jet angles. The slope of the dependence of the multiplicity with respect to the topological scale was measured to be: 2.211 +/- 0.014 (stat.) +/- 0.053 (syst.) in good agreement with the expectation given by the colour-factor ratio C_A / C_F = 9/4. This result strongly supports the assumption of local parton-hadron duality, LPHD, at low hadron momentum.
dc.description14 pages, 3 figures, Accepted by Phys. Lett. B
dc.identifierhttps://arxiv.org/abs/hep-ex/0410075
dc.identifierhttp://arxiv.org/abs/hep-ex/0410075
dc.identifierPhys.Lett.B605:37-48,2005
dc.identifierdoi:10.1016/j.physletb.2004.10.059
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/206066
dc.subjectHigh Energy Physics - Experiment
dc.titleCoherent Soft Particle Production in Z Decays into Three Jets
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