We study the sensitivity to anomalous quartic $ZZ\gamma\gamma$ couplings through the processes $e^{ +}e^{ -}\rightarrow Z\, Z\, \gamma$, $e^{ +}e^{ -} \rightarrow e^{ +}\gamma^{ *} e^{ -} \rightarrow e^{ +} Z\, Z\, e^{ -}$ and $e^{ +}e^{ -} \rightarrow e^{ +}\gamma^{ *} \gamma^{ *} e^{ -} \rightarrow e^{ +}\, Z\, Z\, e^{ -}$ at the CLIC. We find $95\%$ confidence level bounds on these coupling parameters defining by the dimension-six operators. The best bounds on the anomalous $ZZ\gamma\gamma$ couplings among the three processes are obtained from $e^{ +}e^{ -}\rightarrow Z\, Z\, \gamma$ at a center of mass energy of $3$ TeV and an integrated luminosity of $590$ fb$^{ -1}$. We show that the best bounds obtained on both the anomalous coupling parameters are of the order of $10^{ -8}$ GeV$^{ -2}$, significantly improving the current bounds.
Categories: hep-ph