Anomalous quarticWWγγandZZγγcouplings ineγcollision with initial beam and final state polarizations

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Abstract

The constraints on the anomalous quartic $WW\ensuremath{\gamma}\ensuremath{\gamma}$ and $ZZ\ensuremath{\gamma}\ensuremath{\gamma}$ gauge boson couplings are investigated through the processes $e\ensuremath{\gamma}\ensuremath{\rightarrow}{W}^{\ensuremath{-}}\ensuremath{\gamma}{\ensuremath{\nu}}_{e}$ and $e\ensuremath{\gamma}\ensuremath{\rightarrow}Z\ensuremath{\gamma}e$. Considering the longitudinal and transverse polarization states of the final $W$ or $Z$ boson and incoming beam polarizations we find 95% confidence level limits on the anomalous coupling parameters ${a}_{0}$ and ${a}_{c}$ with an integrated luminosity of $500\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ and $\sqrt{s}=0.5$, 1 TeV energies. Assuming the ${W}^{+}{W}^{\ensuremath{-}}\ensuremath{\gamma}\ensuremath{\gamma}$ couplings are independent of the $ZZ\ensuremath{\gamma}\ensuremath{\gamma}$ couplings we show that the longitudinal polarization state of the final gauge boson improves the sensitivity to anomalous couplings by a factor of 2-3 depending on energy and coupling. An extra enhancement in sensitivity by a factor of 1.3 comes from a set of initial beam polarizations.

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