Probing anomalous ZZH and gammaZH interactions at an e+e- linear collider using polarized beams

TL;DR

This paper investigates how polarized beams at a future e+e- linear collider can be used to detect anomalous ZZH and gammaZH interactions through specific correlations in the e+e- -> HZ process.

Contribution

It introduces new polarization-dependent observables and analyzes their sensitivity to anomalous couplings in ZZH and gammaZH interactions.

Findings

Beam polarization enhances sensitivity to anomalous couplings.

Correlations involving lepton momenta and spins improve detection prospects.

Quantitative limits on anomalous couplings are derived.

Abstract

We examine anomalous ZZH and gammaZH interactions in the process e+e- -> HZ followed by Z -> l+l- at a linear collider. We study the effects of beam polarization, both longitudinal and transverse, in probing these anomalous couplings. We study various correlations constructed out of the initial and final state lepton momenta and the spins of electron and positron. We evaluate the sensitivity of these observables to probe anomalous couplings at the linear collider.