Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-10-02
Physics
High Energy Physics
High Energy Physics - Phenomenology
37 pages, version to be published
Scientific paper
10.1140/epjc/s10052-008-0816-y
We report on the calculation of the next-to-leading order QCD corrections to the production of top--antitop-quark pairs in association with a hard jet at the Tevatron and at the LHC. Results for integrated and differential cross sections are presented. We find a significant reduction of the scale dependence. In most cases the corrections are below 20% indicating that the perturbative expansion is well under control. Moreover, the forward--backward charge asymmetry of the top-quark, which is analyzed at the Tevatron, is studied at next-to-leading order. We find large corrections suggesting that the definition of the observable has to be refined.
Dittmaier Stefan
Uwer Peter
Weinzierl Stefan
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