# Forward-backward asymmetry in the gauge-Higgs unification at the International Linear Collider

## TL;DR

This paper investigates how the gauge-Higgs unification model affects fermion pair production asymmetries at the ILC, highlighting observable deviations from the Standard Model predictions due to Kaluza-Klein modes.

## Contribution

It provides the first detailed analysis of forward-backward asymmetry deviations in the gauge-Higgs unification model at the ILC with polarized beams.

## Key findings

- Deviations in asymmetries are significant and detectable.
- Differences depend on quark bulk mass parameters.
- Predictions for two quark mass parameter cases.

## Abstract

The signals of the SO(5) \times U(1) gauge-Higgs unification model at the International Linear Collider are studied. In this model, Kaluza-Klein modes of the neutral gauge bosons affect fermion pair productions. The deviations of the forward-backward asymmetries of the $e^+e^-\to \bar{b}b$, $\bar{t}t$ processes from the standard model predictions are clearly seen by using polarised beams. The deviations of these values are predicted for two cases, the bulk mass parameters of quarks are positive and negative case.