Abstract : We report on the observation of single W boson production in a data sample collected by the L3 detector at LEP2. The signal consists of large missing energy final states with a single energetic lepton or two hadronic jets. The cross-section is measured to be $0.61^{+0.43}_{-0.33} \pm 0.05 \; \rm{pb}$ at the centre of mass energy $\sqrt{s}=172 \GeV{}$, consistent with the Standard Model expectation. From this measurement the following limits on the anomalous $\gamma$WW gauge couplings are derived at 95\% CL: $\rm -3.6 \Delta \kappa_\gamma 1.5$ and $\rm -3.6 \lambda_\gamma 3.6$.
http://hal.in2p3.fr/in2p3-00000069
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Soumis le : lundi 16 novembre 1998 - 15:11:12 Dernière modification le : jeudi 6 février 2020 - 16:22:02 Document(s) archivé(s) le : vendredi 29 mai 2015 - 14:56:20
M. Acciarri, O. Adriani, M. Aguilar-Benitez, S. Ahlen, B. Alpat, et al.. Production of Single W Bosons at LEP. Physics Letters B, Elsevier, 1997, 403, pp.168-176. ⟨in2p3-00000069⟩