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T: Fachverband Teilchenphysik

T 12: QCD (Theorie) / Quantenfeldtheorie

T 12.8: Talk

Friday, April 1, 2011, 15:50–16:05, 30.23: 10-1

One-loop Gluon Amplitudes with Generalised Unitarity — •Benedikt Biedermann — Humboldt-Universität zu Berlin

The evaluation of colour-ordered n-gluon amplitudes at one-loop order in pure Yang-Mills theory is presented. Thereby the recently developed technique of generalised unitarity is used. Our program can handle arbitrary numbers of external gluons. Running in double precision one gets reliable results for up to 14 gluons with only a small fraction of events requiring a re-evaluation using extended floating point arithmetic. First applications of the program are shown.