Two-Loop Electroweak Corrections to $\Delta r$

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.

Comments: 3 pp, 1 fig, Talk given at RADCOR/Loops & Legs 02 (Sept. 8-13, 2002, Kloster Banz, Germany)