Towards a Fully Automated Differential $\text{NNLO}_\text{EW}$ Generator for Lepton Colliders

TL;DR

This paper introduces a method for fully automating the calculation of high-precision electroweak corrections at NNLO for lepton collider processes, crucial for future experiments.

Contribution

It presents a process-independent, automated approach based on the Yennie-Frautschi-Suura theorem for IR divergence subtraction and resummation matching.

Findings

Provides a systematic framework for NNLO electroweak corrections.

Ensures proper matching with all-orders resummation techniques.

Facilitates high-precision theoretical predictions for lepton colliders.

Abstract

Future proposed lepton collider experiments will reach unprecedented levels of accuracy. To ensure the success of these experiments, and to fully exploit their wealth of data, the precision of theory calculations must reach comparable or even better levels. One bottleneck in achieving this precision target lies in the systematic, process-independent inclusion of higher-order corrections at Next-to-Next-to-Leading Order in the electroweak coupling $\text{NNLO}_\text{EW}$ while ensuring the correct matching with modern all-orders resummation techniques. Here, we present a solution to this problem, based on the Yennie-Frautschi-Suura theorem, which employs a local infrared (IR) subtraction to remove divergences and its matching to an all-order resummation of the soft and soft-collinear logarithms.