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Title
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Electroweak measurements in electron positron collisions at W-boson-pair energies at LEP
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Author
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Institution/Organisation
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ALEPH Collaboration
DELPHI Collaboration
L3 Collaboration
OPAL Collaboration
LEP Electroweak Working Group
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Abstract
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| Electroweak measurements performed with data taken at the electron positron collider LEP at CERN from 1995 to 2000 are reported. The combined data set considered in this report corresponds to a total luminosity of about 3 fb(-1) collected by the four LEP experiments ALEPH, DELPHI, 13 and OPAL, at centre-of-mass energies ranging from 130 GeV to 209 GeV. Combining the published results of the four LEP experiments, the measurements include total and differential cross-sections in photon-pair, fermion-pair and four-fermion production, the latter resulting from both double-resonant WW and ZZ production as well as singly resonant production. Total and differential cross-sections are measured precisely, providing a stringent test of the Standard Model at centre-of-mass energies never explored before in electron positron collisions. Final-state interaction effects in four-fermion production, such as those arising from colour reconnection and Bose Einstein correlations between the two W decay systems arising in WW production, are searched for and upper limits on the strength of possible effects are obtained. The data are used to determine fundamental properties of the W boson and the electroweak theory. Among others, the mass and width of the W boson, m(w) and Gamma(w), the branching fraction of W decays to hadrons, B(W -> had), and the trilinear gauge-boson self-couplings g(1)(Z), K-gamma and lambda(gamma), are determined to be: m(w) = 80.376 +/- 0.033 GeV Gamma(w) = 2.195 +/- 0.083 GeV B(W -> had) = 67.41 +/- 0.27% g(1)(Z) = 0.984(-0.020)(+0.018) K-gamma - 0.982 +/- 0.042 lambda(gamma) = 0.022 +/- 0.019. (C) 2013 Elsevier B.V. All rights reserved. |
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Language
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English
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Source (journal)
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Physics reports. - Amsterdam, 1971, currens
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Publication
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Amsterdam
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North-Holland
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2013
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ISSN
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0370-1573
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DOI
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10.1016/J.PHYSREP.2013.07.004
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Volume/pages
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532
:4
(2013)
, p. 119-244
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ISI
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000328723800001
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Full text (Publisher's DOI)
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Full text (publisher's version - intranet only)
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