# TTP02-38 Two-Loop Electroweak Corrections to $\Delta r$

TTP02-38 Two-Loop Electroweak Corrections to $\Delta r$

TTP02-38 Two-Loop Electroweak Corrections to $\Delta r$

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.

 A. Onishchenko, O. Veretin Nucl.Phys. B (Proc.Suppl.) 116 235-237 2003 PDF PostScript arXiv