Bose-Einstein Correlations in e+e- to W+W- at 172 and 183 GeV

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dc.creatorThe OPAL Collaboration
dc.creatoral, G. Abbiendi et
dc.date1998-11-18
dc.date.accessioned2026-07-07T12:02:27Z
dc.date.available2026-07-07T12:02:27Z
dc.descriptionBose-Einstein correlations between like-charge pions are studied in hadronic final states produced by e+e- annihilations at center-of-mass energies of 172 and 183 GeV. Three event samples are studied, each dominated by one of the processes W+W- to qqlnu, W+W- to qqqq, or (Z/g)* to qq. After demonstrating the existence of Bose-Einstein correlations in W decays, an attempt is made to determine Bose-Einstein correlations for pions originating from the same W boson and from different W bosons, as well as for pions from (Z/g)* to qq events. The following results are obtained for the individual chaoticity parameters lambda assuming a common source radius R: lambda_same = 0.63 +- 0.19 +- 0.14, lambda_diff = 0.22 +- 0.53 +- 0.14, lambda_Z = 0.47 +- 0.11 +- 0.08, R = 0.92 +- 0.09 +- 0.09. In each case, the first error is statistical and the second is systematic. At the current level of statistical precision it is not established whether Bose-Einstein correlations, between pions from different W bosons exist or not.
dc.description24 pages, LaTeX, including 6 eps figures, submitted to European Physical Journal C
dc.identifierhttps://arxiv.org/abs/hep-ex/9811030
dc.identifierhttp://arxiv.org/abs/hep-ex/9811030
dc.identifierEur.Phys.J.C8:559-571,1999
dc.identifierdoi:10.1007/s100529900014
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/207445
dc.subjectHigh Energy Physics - Experiment
dc.titleBose-Einstein Correlations in e+e- to W+W- at 172 and 183 GeV
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