High precision calculations of electroweak radiative corrections for polarized Moller scattering at one loop and beyond

TL;DR

This paper updates calculations of electroweak radiative corrections for polarized Moller scattering at one loop and discusses the importance of two-loop corrections for future high-precision experiments.

Contribution

It provides new one-loop electroweak correction calculations using two approaches and compares different renormalization schemes, highlighting the need for two-loop analysis.

Findings

Updated one-loop EWC calculations with two methods

Comparison between on-shell and differential renormalization schemes

Indication that two-loop corrections are significant for future precision

Abstract

Parity-violating Moller scattering measurements are a powerful probe of new physics effects, and the upcoming high-precision experiments will require a new level of accuracy for electroweak radiative corrections (EWC). First, we perform the updated calculations of one-loop EWC for Moller scattering asymmetry using two different approaches: semi-automatic, precise, with FeynArts and FormCalc as base languages, and "by hand", with reasonable approximations. In addition, we provide a tuned comparison between the one-loop results obtained in two different renormalization schemes: on-shell and constrained differential renormalization. As the last step, we discuss the two-loop EWC induced by squaring one-loop diagrams, and show that the significant size of this partial correction indicates a need for a complete study of the two-loop EWC in order to meet the precision goals of future experiments.