Two-loop electroweak corrections to high energy large-angle Bhabha scattering

TL;DR

This paper calculates the significant two-loop electroweak corrections to high-energy Bhabha scattering at large angles, which are crucial for precise luminosity measurements at future linear colliders.

Contribution

It provides the first detailed computation of dominant two-loop electroweak corrections in the high-energy, large-angle regime for Bhabha scattering.

Findings

Two-loop corrections can exceed one percent at high energies.

Corrections are essential for high-precision luminosity spectrum determination.

The results improve theoretical predictions for future collider experiments.

Abstract

We compute the dominant logarithmically enhanced two-loop electroweak corrections to the electron-positron scattering differential cross section in the high energy limit for large scattering angles. Depending on the scattering angle and energy the two-loop corrections may exceed one percent and are important for the high-precision luminosity spectrum determination at a future linear collider.