https://doi.org/10.1140/epjc/s2005-02164-6
theoretical physics
Corrections to quark asymmetries at LEP
1
Fermi National Accelerator Laboratory, IL 60510-500, Batavia, USA
2
Deutsches Elektronen-Synchrotron DESY, Platanenallee 6, 15738, Zeuthen, Germany
* e-mail: afreitas@fnal.gov
The most precise measurement of the weak mixing angle 
at LEP is from the forward-backward asymmetry 
at the Z-pole. In this note the QED and electroweak radiative corrections to obtain the pole asymmetry from the measured asymmetry for b- and c-quarks have been calculated using ZFITTER, which has been amended to allow a consistent treatment of partial two-loop corrections for the b-quark final asymmetries. A total correction of 
and 
has been found, where the remaining theoretical uncertainty is much too small to explain the apparent discrepancy between obtained from A
FB
b
and from the left-right asymmetry at SLD.
© Springer-Verlag, 2005
