One-loop Electro-Weak Corrections to the Event Orientation of e+e- into 3 jet Processes

TL;DR

This paper calculates detailed one-loop Electroweak corrections to e+e- into 3 jets, analyzing their impact on event orientation at Z peak and future collider energies with polarized beams.

Contribution

It provides the first comprehensive calculation of one-loop EW corrections including both factorisable and non-factorisable effects for event orientation in e+e- to 3 jets.

Findings

Electroweak corrections significantly affect event orientation.

Polarization enhances sensitivity to EW effects.

Results are relevant for SLC, ILC, and CLIC experiments.

Abstract

We compute the full one-loop Electro-Weak (EW) contributions of O(alpha_S alpha_EM^3) entering the electron-positron into a quark-antiquark pair plus one gluon cross section at the Z peak and LC energies in presence of polarisation of the initial state and by retaining the event orientation of the final state. We include both factorisable and non-factorisable virtual corrections, photon bremsstrahlung but not the real emission of W^\pm and Z bosons. Their importance for the final state orientation is illustrated for beam polarisation setups achieved at SLC and foreseen at ILC and CLIC.