Properties of hadronic events in e+e− annihilation at $S^(1/2)$ = 91-GeV

Decamp, D. and Finch, Alexander (1990) Properties of hadronic events in e+e− annihilation at $S^(1/2)$ = 91-GeV. Physics Letters B, 234 (1-2). pp. 209-218. ISSN 0370-2693

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We report on properties of hadronic events from e+e− annihilation observed by the ALEPH detector at the large Electron Positron Collider at CERN. The center-of-mass energy was . Measured distributions of the global event-shape variables sphericity, aplanarity, thrust and minor value, and of the inclusive variables xp, p⊥in, p⊥out and y are presented. We measure a mean charged multiplicity in hadronic events of 〈Nch〉=21.3±0.1 (statistical)±0.6 (systematic). The data are in good agreement with QCD-based models which use the leading-logarithm approximation, and are less well described by a model using O(αs2) QCD.

Item Type: Journal Article
Journal or Publication Title: Physics Letters B
Uncontrolled Keywords: /dk/atira/pure/subjectarea/asjc/3100/3106
Departments: Faculty of Science and Technology > Physics
ID Code: 63826
Deposited By: ep_importer_pure
Deposited On: 02 May 2013 14:47
Refereed?: Yes
Published?: Published
Last Modified: 30 Sep 2019 17:23

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