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

Author(s): Heister A., Barate R., Bruneliere R., De Bonis I., Decamp D., Goy C., Jezequel S., Lees J.P., Martin F., Merle E., Minard M.N., Pietrzyk B., Trocme B., Badaud F., Dessagne S., Falvard Alain, Fayolle D., Gay P., Jousset J., Michel B., Monteil S., Pallin D., Pascolo J.M., Perret P., Blondel A., Brient J-C., Machefert F., Rouge A., Swynghedauw M., Jacholkowska Agnieszka

(Article) Published: European Physical Journal C, vol. 38 p.147-160 (2004)
Links openAccess full text : openaccess


Ref HAL: in2p3-00021734_v1
DOI: 10.1140/epjc/s2004-02048-3
Exporter : BibTex | endNote
7 citations
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).