We search for a Higgs particle with anomalous couplings in the $\mathrm{e}^+\mathrm{e}^-\rightarrow\mathrm{H}\gamma$, $\mathrm{e}^+\mathrm{e}^-\rightarrow\mathrm{H}\mathrm{Z}$ and $\mathrm{e}^+\mathrm{e}^-\rightarrow\mathrm{H}\mathrm{e}^+\mathrm{e }^-$ processes with the L3 detector at LEP. We explore the mass range 70~{\rm GeV} < m_\mathrm{H} < 170~{\rm GeV} using 176~{\rm pb}^{-1} of integrated luminosity at a center-of-mass energy of \sqrt{s} = 189~{\rm GeV}. The Higgs decays $\mathrm{H}\rightarrow\mathrm{b}\mathrm{\overline{b}}$, $\mathrm{H}\rightarrow\gamma\gamma$ and $\mathrm{H}\rightarrow\mathrm{ Z}\gamma$ are considered in the analysis. No evidence for anomalous Higgs production is found. This is interpreted in terms of limits on the anomalous couplings $d$, $d_B$, $\Delta g_1^\mathrm{Z}$ and $\Delta \kappa_\gamma$. Limits on the $\Gamma(\mathrm{H}\rightarrow\gamma\gamma)$ and $\Gamma(\mathrm{H}\rightarrow\mathrm{Z}\gamma)$ partial widths in the explored Higgs mass range are also obtained.

Log in to your administrator account to edit.