W polarisation and spin density matrix measurements at LEP
نویسندگان
چکیده
منابع مشابه
Ww Production, Polarisation and Spin Correlations at Lep
During the data taking years from 1996 to 2000 the LEP2 program has delivered ee interactions at centre of mass energies ranging from 161 to 207 GeV. In this period the four LEP experiments (ALEPH, DELPHI, L3, OPAL) have collected a total integrated luminosity of almost 3 fb. The LEP2 data yielded about 40,000 W pair events, reconstructed in all their decay channels. Event rates allowed measure...
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A summary of the W-boson properties measured by the four LEP collaborations is presented here. These properties are updated to take into account the most recent results presented at the ICHEP98 Conference. 1 WW cross sections and W branching fractions After the period of running at the Z, the centre-of-mass energy of LEP has been progressively increased from 161 GeV, i.e., just above the W pair...
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Studying the properties of the W boson plays a key role in precision tests of the Standard Model. The key measurements performed over the last decade will be reviewed. W-pair and single-W cross-sections and W decay branching fractions are determined and agree well with theoretical predictions. Including the analysis of differential distributions, trilinear and quartic couplings of the W boson t...
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The status of the LEP precision measurements is reviewed, covering the electroweak measurements at the Z0, the studies of fermion pair production, and the totally new subject of W physics at LEP-2. The results presented here include both published and preliminary ones. These precision results are used to check the overall consistency of the Standard Model, and in its framework, constraints on i...
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We review here the measurements of W-pair production and W decay rates performed by the four LEP experiments at √ s from 161 to 209 GeV, and their relevance in support of the standard electroweak model.
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ژورنال
عنوان ژورنال: Nuclear Physics B - Proceedings Supplements
سال: 2003
ISSN: 0920-5632
DOI: 10.1016/s0920-5632(03)90517-2