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The department of physics and astronomy offers information to and cooperation with the society in various ways, such as organizing exhibitions and demonstrations to schools and the general public, taking part in various working groups within our respective fields of research and by performing commissioned research and education (see links to the left).

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Current seminars

Modern Methods in Amplitudes III

Oluf Engelund
Uppsala University
2015-03-06 11:00
Oseenska rummet, 73121
Type : 
Theoretical Physics

Scattering amplitudes can be computed with Feynman rules but that is not always the most convenient method and a lot of more efficient techniques are known. I will go through the basics of scattering amplitudes and explain the BCFW recursion relations which is very useful at loop level, then go on to discuss generalized unitarity which can be used to piece together loop-level amplitudes from tree-level amplitudes. Finally, I'll go through some of the basics concerning twistor string theories and the Grassmanian formulation of scattering amplitudes in N=4 SYM.