Anomalous Higgs couplings in egamma collision with initial beam and final state polarizations

TL;DR

This paper studies how beam and W boson polarizations in e-gamma collisions can significantly improve constraints on anomalous Higgs couplings, providing tighter limits at high energies.

Contribution

It introduces a method to enhance sensitivity to anomalous WWH couplings using polarization states in e-gamma collisions, with detailed confidence level limits.

Findings

Polarizations improve sensitivity to anomalous couplings.

95% CL limits achieved at 0.5 and 1 TeV energies.

Enhanced constraints on parameters b_W and β_W.

Abstract

We investigate the constraints on the anomalous WWH couplings through the process $e^{-}\gamma \to \nu_{e} W^{-} H$. Considering incoming beam polarizations and the longitudinal and transverse polarization states of the final W boson, we find 95% confidence level limits on the anomalous coupling parameters with an integrated luminosity of 500 $fb^{-1}$ and $\sqrt{s}$= 0.5 and 1 TeV energy. We show that initial beam and final state polarizations highly improve the sensitivity limits of the anomalous coupling parameters $b_{W}$ and $\beta_{W}$.