CP violating effects in the decay Z -> mu^+mu^-gamma induced by ZZgamma and Zgammagamma couplings

Abstract

We analyze possible CP-violating effects induced in the $Z$ decay with hard photon radiation by $\gamma ZZ$ and $\gamma \gamma Z$ anomalous vertices. We estimate the sensibility of future linear collider experiments on these couplings coming from CP-odd asymmetries associated to angular correlations of the three particle final state in $e^{+}{e}^{-}\to Z\to {\mu }^{+}{\mu }^{-}\gamma$. We find that a linear collider with an integrated luminosity of 500 $f{b}^{-1}$ and $\sqrt{s}=0.05$ TeV can place the bound $|h_1^{\gamma ,Z}|<0.92$ at the 90% confidence level for these couplings.

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