https://doi.org/10.1007/s100529900173
Theoretical physics
Non-singlet corrections of 
to 
Institut für Theoretische Teilchenphysik, Universität Karlsruhe, D-76128 Karlsruhe, Germany
, DE
Institut für Theoretische Physik, Universität Bern, CH-3012 Bern, Switzerland
, CH
Received:
16
March
1999
Published online:
3
August
1999
The partial decay rate of the Z boson into bottom quarks constitutes an important decay channel. This is mainly due to the virtual presence of the top quark in the loop diagrams giving rise to correction factors which are quadratic in the top quark mass. At one- and two-loop order it turned out that the leading term in the heavy-top expansion leads to very good approximations to the exact result. In this work the non-singlet diagrams at are considered.
© Springer-Verlag Berlin Heidelberg, 1999
