Virtual and soft pair corrections to polarized muon decay spectrum
A. B. Arbuzov
Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, 141980 Dubna, Russia
PACS: 12.20.-m, 13.35.Bv
Abstract
Radiative corrections to the muon decay spectrum due to soft
and virtual electron-positron pairs are calculated within the
next-to-next-to-leading approximation. The effect is relevant
for modern precision experiments on the decay spectrum.