Thursday Afternoon II
- Matteo CACCIARI (LPTHE)
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...
Due to the start of the LHC, perturbative calculations for scattering processes with a large number of particles in the final state and to a very high precision are needed, leading to Feynman diagrams with a large number of external legs and many loops. In addition to the calculation of diagrams by applying Feynman parameters, various unitarity and recursive methods have been successfully used...
Vittorio Del Duca
Maria Vittoria GARZELLI