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Published December 8, 2008 | Published
Journal Article Open

Study of hadronic event shape in flavour tagged events in e^+e^- annihilation at ^(⟨s√⟩) = 197 GeV


Results are presented from a study of the structure of hadronic events in high-energy e^+e^- interactions detected by the L3 detector at LEP. Various event shape distributions and their moments are measured at several energy points at and above the Z-boson mass. The event flavour is tagged by using the decay characteristics of b-hadrons. Measurements of distributions of event shape variables for all hadronic events, for light (u, d, s, c) and heavy (b) quark flavours are compared to several QCD models with improved leading log approximation: JETSET, HERWIG and ARIADNE. A good description of the data is provided by the models.

Additional Information

© 2009 L3 Collaboration. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Published: 8 December 2008. Received: 6 June 2008. Accepted: 8 December 2008. Supported by the German Bundesministerium für Bildung, Wissenschaft, Forschung und Technologie. Supported by the Hungarian OTKA fund under contract numbers T019181, F023259 and T037350. Also supported by the Hungarian OTKA fund under contract number T026178. Supported also by the Comisión Interministerial de Ciencia y Tecnologia. Also supported by CONICET and Universidad Nacional de La Plata, CC 67, 1900 La Plata, Argentina. Supported by the National Natural Science Foundation of China.

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