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T: Teilchenphysik

T 103: Hauptvortr
äge III

T 103.2: Hauptvortrag

Montag, 7. März 2005, 11:05–11:55, TU H105

New results and concepts in perturbative QCD — •Andreas Vogt — NIKHEF and University of Durham

For the next decade, the high-energy frontier of particle physics will be at colliders with proton beams, especially the LHC. At such machines, quantitative studies of the standard model and of (un-)expected new particles require reliable predictions of strong interaction corrections and backgrounds. The talk focuses on two recent developments. The first is the determination of the three-loop contributions to the splitting functions governing the evolution of the partonic luminosities. This computation opens the way for complete third-order calculations of important few-parton processes like Higgs production. The second is the development of a new formalism, based on Witten’s observation of relation between gauge-theory amplitudes and a string theory in twistor space. This approach is especially promising for low-order calculations of multi-parton amplitudes where it has already lead to new results.