Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2005-05-30
ECONFC050318:0609,2005
Physics
High Energy Physics
High Energy Physics - Phenomenology
6 pages, latex, 8 postscript figures, to appear in the proceedings of the "2005 International Linear Collider Workshop" (LCWS0
Scientific paper
The recently completed calculation of the full electroweak O(alpha) corrections to the charged-current four-fermion production processes e+e- --> nu_tau tau+ mu- anti-nu_mu, u anti-d mu- anti-nu_mu, and u anti-d s anti-c is briefly reviewed. The calculation is performed using complex gauge-boson masses, supplemented by complex couplings to restore gauge invariance. The evaluation of the occurring one-loop tensor integrals, which include 5- and 6-point functions, requires new techniques. The effects of the complete O(alpha) corrections to the total cross section and to some differential cross sections of physical interest are discussed and compared to predictions based on the double-pole approximation, revealing that the latter approximation is not sufficient to fully exploit the potential of a future linear collider in an analysis of W-boson pairs at high energies.
Denner Ansgar
Dittmaier Stefan
Roth Marcel
Wieders L. H.
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