2019 Impact factor 4.389
Particles and Fields

Eur. Phys. J. C 19, 99-104
DOI: 10.1007/s100520100577

Hadronic corrections at ${\cal O}(\alpha^2)$ to the energy spectrum of muon decay

A.I. Davydychev, K. Schilcher and H. Spiesberger

Institut für Physik, Johannes-Gutenberg-Universität, Staudinger Weg 7, 55099 Mainz, Germany


(Received: 24 November 2000 / Published online: 5 February 2001 -© Springer-Verlag 2001)

We consider the impact of ${\cal O}(\alpha^2)$ hadronic corrections to the energy spectrum of the decay electron in muon decay. We find that the correction can be described, within good approximation, by a linear function in the electron energy. Explicit expressions for the form factors needed in an approach based on dispersion integrals are given.

© Società Italiana di Fisica, Springer-Verlag 2001