Measurement of the cross section of W-boson pair production at LEP

The cross section of W-boson pair-production is measured with the L3 detector at LEP. In a data sample corresponding to a total luminosity of 629.4 pb-1, collected at centre-of-mass energies ranging from 189 to 209 GeV, 9834 four-fermion events with W bosons decaying into hadrons or leptons are selected. The total cross section is measured with a precision of 1.4% and agrees with the Standard Model expectation. Assuming charged-lepton universality, the branching fraction for hadronic W-boson decays is measured to be: Br(W→hadrons)=67.50±0.42(stat.)±0.30(syst.)%, in agreement with the Standard Model. Differential cross sections as a function of the W- production angle are also measured for the semi-leptonic channels qqeν and qqμν. © 2004 Published by Elsevier B.V.

Published in:
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 600, 1-2, 22-40
Other identifiers:
Scopus: 2-s2.0-4644371321

 Record created 2010-11-05, last modified 2018-01-28

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