# Measurement of W-pair production in $e^{+}e^{-}$ collisions at centre-of-mass energies from 183 to 209 GeV

Abstract : The W+W- production cross section is measured from a data sample corresponding to a total integrated luminosity of 683 pb-1, collected by the Aleph experiment at LEP at centre-of-mass energies from 183 to 209 GeV. Individual cross sections for the different topologies arising from W decays into leptons or hadrons, as well as the total W-pair cross section are given at eight centre-of-mass energies. The results are found to be in agreement with recently developed Standard Model calculations at the one percent level. The branching fraction of the W boson into hadrons is measured to be B (W--> hadrons) = (67.15 +- 0.37(stat) +- 0.15(syst))%, from which the CKM matrix element |Vcs| is determined to be 0.959 +- 0.017(stat) +- 0.008(syst).
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Journal articles

Cited literature [8 references]

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Submitted on : Tuesday, April 27, 2004 - 3:36:09 PM
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### Citation

A. Heister, S. Schael, R. Barate, R. Bruneliere, I. de Bonis, et al.. Measurement of W-pair production in $e^{+}e^{-}$ collisions at centre-of-mass energies from 183 to 209 GeV. European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2004, 38, pp.147-160. ⟨10.1140/epjc/s2004-02048-3⟩. ⟨in2p3-00021734⟩

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