Eur. Phys. J. C 20, 227-231
Fermion mass effects in and with cutsF. Jegerlehner1 and K. Kolodziej2
1 Deutsches Elektronen-Synchrotron DESY, Platanenallee 6, 15768 Zeuthen, Germany
2 Institute of Physics, University of Silesia, ul. Uniwersytecka 4, 40007 Katowice, Poland
(Received: 11 January 2001 / Revised version: 28 March 2001 / Published online: 18 May 2001 -© Springer-Verlag / Società Italiana di Fisica 2001)
The fermion mass effects in and in the corresponding bremsstrahlung reactions in the presence of realistic cuts are studied. It is shown that, for some four-fermion final states, the mass effects become sizable to the extent that they may affect the accuracy of theoretical predictions which is required to be better than 1% .
© Società Italiana di Fisica, Springer-Verlag 2001