Two-loop Bhabha Scattering at High Energy beyond Leading Power Approximation

TL;DR

This paper calculates the two-loop power-suppressed double logarithmic corrections to high-energy Bhabha scattering, providing insights into their origin and structure beyond leading power approximations.

Contribution

It introduces a detailed analysis of the two-loop ${ m O}(m_e^2/s)$ contributions and their double-logarithmic behavior in high-energy electron-positron scattering.

Findings

Identification of the structure of power-suppressed double logarithmic corrections

Clarification of their origin in high-energy scattering

Extension beyond leading power approximation

Abstract

We evaluate the two-loop ${\cal O}(m_e^2/s)$ contribution to the wide-angle high-energy electron-positron scattering in the double-logarithmic approximation. The origin and the general structure of the power-suppressed double logarithmic corrections are discussed in detail.