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# Production of Single W Bosons at $\sqrt{s}$ = 189 GeV and Measurement of WW$\gamma$ Gauge Couplings

Abstract : Single W boson production in electron-positron collisions is studied with the L3 detector at LEP. The data sample collected at a centre-of-mass energy of $\sqrt{s} = 188.7 \mathrm{\ Ge\kern -0.1em V}{}$ corresponds to an integrated luminosity of $176.4\,\mbox{pb$^{-1}$}$. Events with a single energetic lepton or two acoplanar hadronic jets are selected. Within phase-space cuts, the total cross-section is measured to be $0.53 \pm 0.12 \pm 0.03 \ \rm{pb}$, consistent with the Standard Model expectation. Including our single W boson results obtained at lower $\sqrt{s}$, the WW$\gamma$ gauge couplings $\kappa_\gamma$ and $\lambda_\gamma$ are determined to be \mbox{$\kappa_\gamma = 0.93 \pm 0.16 \pm 0.09$} and \mbox{$\lambda_\gamma = -0.31^{+0.68}_{-0.19} \pm 0.13$}.
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http://hal.in2p3.fr/in2p3-00005419
Contributor : Sylvie Flores Connect in order to contact the contributor
Submitted on : Monday, September 4, 2000 - 11:16:20 AM
Last modification on : Tuesday, January 25, 2022 - 9:07:41 AM

### Citation

M. Acciarri, P. Achard, O. Adriani, M. Aguilar-Benitez, J. Alcaraz, et al.. Production of Single W Bosons at $\sqrt{s}$ = 189 GeV and Measurement of WW$\gamma$ Gauge Couplings. Physics Letters B, Elsevier, 2000, 487, pp.229-240. ⟨10.1016/S0370-2693(00)00824-8⟩. ⟨in2p3-00005419⟩

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