$WZ$ Production at $e\gamma$ Colliders and Anomalous Quartic $WWZ\gamma$ Coupling

TL;DR

This paper explores how polarized beams and final state polarizations at $e ext{-}\gamma$ colliders can significantly improve constraints on anomalous quartic gauge couplings, specifically $W^{+}W^{-}Z ext{ extminus}\gamma$, at high energies.

Contribution

It provides new limits on the anomalous $W^{+}W^{-}Z ext{ extminus}\gamma$ coupling using polarized beams and final state polarizations at future colliders.

Findings

Polarization improves sensitivity to anomalous couplings by up to 3.5 times.

Constraints are derived for energies of 0.5 and 1 TeV with 500 fb$^{-1}$ luminosity.

Polarization effects are significant in probing new physics in gauge boson interactions.

Abstract

We investigate the constraints on the anomalous quartic $W^{+}W^{-}Z\gamma$ gauge boson coupling through the process $e^{-}\gamma\to \nu_{e}W^{-}Z$. Considering incoming beam polarizations and the longitudinal and transverse polarization states of the final W and Z boson we find 95% confidence level limits on the anomalous coupling parameter $a_{n}$ with an integrated luminosity of 500 $fb^{-1}$ and $\sqrt{s}$=0.5, 1 TeV energies. We show that initial beam and final state polarizations improve the sensitivity to the anomalous coupling by up to factors of 2 - 3.5 depending on the energy.