Bounds on the anomalous $HZγ$ vertex arising from the process $e^+e^-\to τ^+ τ^- γ$

We obtain limits on the anomalous coupling $HZγ$ through data published by the L3 Collaboration on the process $e^+e^-\to τ^+τ^- γ$. Our analysis leads to bounds on this coupling of order $10^{-2}$, for an intermediate mass Higgs boson $115 < M_H < 145$ $GeV$, two orders of magnitude above the Standard Model prediction.

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