# Two-Loop Electroweak Corrections to $Δr$

**Authors:** A. Onishchenko, O. Veretin  
**arXiv:** [hep-ph/0211280](https://arxiv.org/abs/hep-ph/0211280)  
**Date:** 2002-11-18  
**Summary page:** https://www.summarizepaper.com/en/paper/hep-ph--0211280v1/

## Abstract

The two-loop electroweak bosonic correction to the muon lifetime is computed using methods of asymptotic expansion. Combined with previous calculations this completes the full two-loop correction to $\Delta r$ in the Standard Model.