Bounds on the anomalous $HZ\gamma$ vertex arising from the process $e^{+}{e}^{-}\to {\tau }^{+}{\tau }^{-}\gamma$

Abstract

We obtain limits on the anomalous coupling $HZ\gamma$ through data published by the L3 Collaboration on the process $e^{+}{e}^{-}\to {\tau }^{+}{\tau }^{-}\gamma$. 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.

Comments: 10 pages, 3 figures