W physics at the ILC with polarized beams as a probe of the Littlest Higgs Model

TL;DR

This paper explores how polarized beams at the ILC can be used to detect signatures of the Littlest Higgs Model through W pair production and decay observables, enhancing sensitivity with beam polarization.

Contribution

It demonstrates the potential of polarized ILC beams to probe the Littlest Higgs Model via detailed analysis of W production and decay observables.

Findings

Detectable effects on W polarization and decay distributions at 500 and 800 GeV.

Beam polarization significantly enhances the sensitivity to the model.

Observable asymmetries can serve as probes of the Littlest Higgs Model.

Abstract

We study the possibility of using W pair production and leptonic decay of one of the W's at the ILC with polarized beams as a probe of the Littlest Higgs Model. We consider cross-sections, polarization fractions of the W's, leptonic decay energy and angular distributions, and left-right polarization asymmetry as probes of the model. With parameter values allowed by present experimental constraints detectable effects on these observables at typical ILC energies of 500 GeV and 800 GeV will be present. Beam polarization is further found to enhance the sensitivity.