Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2004-10-12
Acta Phys.Polon. B35 (2004) 2655-2669
Physics
High Energy Physics
High Energy Physics - Phenomenology
15 pages, LaTeX, 4 postscript figures. Talk given at the final meeting of the European Network "Physics at Colliders", Montpel
Scientific paper
Some of the most interesting Higgs-production processes at future e+ e- colliders are of the type e+ e- -> f anti-f H. We present a calculation of the complete O(alpha) corrections to these processes in the Standard Model for final-state neutrinos and top quarks. Initial-state radiation beyond O(alpha) at the leading-logarithmic level as well as QCD corrections are also included. The electroweak corrections turn out to be sizable and reach the order of +/-10% and will thus be an important part of precise theoretical predictions for future e+ e- colliders. Furthermore, an overview is given of a technique for a fast and reliable numerical calculation of multi-leg one-loop integrals. The method is numerically stable also for exceptional momentum configurations and easily allows the introduction of complex masses and the calculation of higher orders in the expansion around D=4.
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