# Beam polarization effects on top-pair production at the ILC

## TL;DR

This paper calculates one-loop electroweak corrections to top-pair production at the ILC, highlighting the significant impact of beam polarization and radiative effects on cross sections and angular distributions.

## Contribution

It provides a detailed analysis of polarization-dependent electroweak corrections in top-pair production, including full spin correlations and decay effects.

## Key findings

- Radiative corrections show large polarization dependence on cross sections.
- Energy distribution of bottom quarks is significantly affected by radiative effects.
- Angular observables like forward-backward asymmetry require careful inclusion of corrections.

## Abstract

Full one-loop electroweak-corrections for an $e^-e^+\rightarrow t \bar{t}$ process associated with sequential $t\rightarrow b \mu\nu_\mu$ decay are discussed. At the one-loop level, the spin-polarization effects of the initial electron and positron beams are included in the total and differential cross sections. A narrow-width approximation is used to treat the top-quark production and decay while including full spin correlations between them. We observed that the radiative corrections due to the weak interaction have a large polarization dependence on both the total and differential cross sections. Therefore, experimental observables that depend on angular distributions such as the forward-backward asymmetry of the top production angle must be treated carefully including radiative corrections. We also observed that the energy distribution of bottom quarks is majorly affected by the radiative corrections.