Asymmetries in Processes of Electron-Positron Annihilation

TL;DR

This paper analyzes asymmetries in electron-positron annihilation into fermion pairs, incorporating complete 1-loop electroweak corrections across a wide energy spectrum, to understand their dependence on fundamental electroweak parameters.

Contribution

It provides a comprehensive calculation of asymmetries including radiative corrections, relevant for current and future collider experiments.

Findings

Asymmetries are sensitive to electroweak mixing angle.

Complete 1-loop corrections significantly impact asymmetry predictions.

Results applicable to Z boson peak and higher energies.

Abstract

Processes of electron-positron annihilation into a pair of fermions were considered. Forward-backward and left-right asymmetries were studied, taking into account polarization of initial and final particles. Complete 1-loop electroweak radiative corrections were included. A wide energy range including the $Z$ boson peak and higher energies relevant for future $e^+e^-$ colliders was covered. Sensitivity of observable asymmetries to the electroweak mixing angle and fermion weak coupling was discussed.