Eur. Phys. J. C 20, 233-237
DOI: 10.1007/s100520100665
Top quark production in e+ e- annihilation
A. Biernacik, K. Cieckiewicz and K. KolodziejInstitute of Physics, University of Silesia, ul. Uniwersytecka 4, 40007 Katowice, Poland
(Received: 21 February 2001 / Revised version: 27 March 2001 / Published online: 18 May 2001 -© Springer-Verlag / Società Italiana di Fisica 2001)
Abstract
We analyze the four-fermion reactions
containing a single
top quark and three other fermions, a possible decay product of the resonant
anti-top quark, in the final state. This allows
us to estimate the contribution
of the nonresonant Feynman graphs and effects related to the off mass shell
production and decay of the top quark. We test the sensitivity of the total
cross section at center of mass energies in the 
threshold region
and far above it to the variation of the top quark width.
We perform the calculation in an arbitrary linear gauge
in the framework of the standard model and discuss the important issue
of gauge symmetry violation by a constant top quark width.
© Società Italiana di Fisica, Springer-Verlag 2001
