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Measurement of W pair productions in e+ e- collisions at centre-of-mass energies from 183-GeV to 209-GeV.

Bouhova-Thacker, E. V. and Finch, A. J. and Hughes, G. and Jones, Roger and Smizanska, Ml and Clarke, D. P. and Ellis, G. and Pearson, M. R. and Robertson, N. A. and ALEPH Collaboration, The (2004) Measurement of W pair productions in e+ e- collisions at centre-of-mass energies from 183-GeV to 209-GeV. European Physical Journal C: Particles and Fields, 38 (2). pp. 147-160. ISSN 1434-6044

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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 hadronic branching fraction of the W boson is measured to be = 67.13 0.37(stat.) 0.15(syst.)%, from which the CKM matrix element is determined to be 0.958 0.017(stat.) 0.008(syst.)

Item Type: Article
Journal or Publication Title: European Physical Journal C: Particles and Fields
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
Faculty of Health and Medicine > Health Research
ID Code: 23957
Deposited By: ep_ss_importer
Deposited On: 24 Feb 2009 13:30
Refereed?: Yes
Published?: Published
Last Modified: 09 Apr 2014 20:27
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/23957

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