TH seminar Prof. Aude Gehrmann (Zurich) [Precision QCD with jet observables]

Thursday 5 Mar 2009, 16:15 → 17:15 Europe/Brussels

Jet production observables are among the most sensitive probes of QCD at high energy colliders, where they are used for example to determine the strong coupling constant. Until recently, the interpretation of jet production data within perturbative QCD was restricted to next-to-leading (NLO) calculations, with theoretical uncertainties being considerably larger than current experimental errors. We describe the first NNLO calculation of jet observables in electron-positron annihilation, and discuss the impact of these new results on the interpretation of precision QCD data from LEP.