Asymmetries in $e^+e^-\to f\bar{f}$ processes at ILC for models with an extra neutral vector boson $Z^\prime$

TL;DR

This paper investigates how asymmetries in electron-positron collisions at the ILC can distinguish between models predicting extra neutral Z' bosons, aiding in identifying the specific new physics model.

Contribution

It develops a method to use asymmetries at and off the Z' peak to discriminate among different Z' models with minimal ambiguity.

Findings

Asymmetries effectively differentiate Z' models.

Analysis applicable both on and off the Z' resonance.

Method enhances model discrimination at the ILC.

Abstract

Many extensions of the standard model predict the existence of extra neutral vector bosons, generically referred as $Z^\prime$. This boson may be discovered at the LHC but in this case it will be necessary to study the respective parameters in order to discriminate to which model it belongs to. This is a task for a much clean lepton linear collider as the future ILC. In this paper we develop an exemplary study of the capability of several asymmetries on and off $Z^\prime$ peak in discriminating among those extensions with (almost) no ambiguities.