Acciarri, M. ; Adriani, O. ; Aguilar-Benitez, M. ; Gurtu, A. ; et., al (1997) Measurement of W-pair cross sections in e+e- interactions at √s = 172 GeV and W-decay branching fractions Physics Letters B, 407 (3-4). pp. 419-431. ISSN 0370-2693
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Official URL: http://www.sciencedirect.com/science/article/pii/S...
Related URL: http://dx.doi.org/10.1016/S0370-2693(97)00802-2
Abstract
We report on the measurement of W-boson pair-production with the L3 detector at LEP at an average centre-of-mass energy of 172.13 GeV. In a data sample corresponding to a total luminosity of 10.25 pb-1 we select 110 four-fermion events with pairs of hadronic jets or leptons with high invariant masses. Branching fractions of W decays into different fermion-antifermion pairs are determined with and without the assumption of charged-current lepton universality. The branching fraction for hadronic W decays is measured to be: B(W → hadrons) = 64.2-3.8+3.7 (stat.) ± 0.5 (syst.) %. Combining all final states the total cross section for W-pair production is measured to be: σWW = 12.27-1.32+1.41 (stat.) ± 0.23 (syst.) pb. The results are in good agreement with the Standard Model.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| ID Code: | 84639 |
| Deposited On: | 27 Feb 2012 03:29 |
| Last Modified: | 27 Feb 2012 03:29 |
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