Ponente
Petros Drangiotis
Descripción
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 in the past years to address this issue and to calculate scattering amplitudes for multi-particle processes up to next-to-leading order (NLO). In this talk, I will present the Duality Method, which provides a cutting-relation to calculate loop diagrams in a similar manner like the corresponding real-radiation tree diagrams. I will introduce this method in detail and show how it can be extended to higher loop orders beyond NLO.
