BGU Physics Department

Colloquium, June 21st, 2012

Hidden Symmetries of Scattering Amplitudes: or the Return of the Analytic S-Matrix

Andreas Brandhuber, University of London
The past few years have seen remarkable progress in our understanding of scattering amplitudes in gauge theories like QCD and gravity. Theoretical advances including the discovery of unexpected symmetries and rich mathematical structures have dramatically improved our ability to compute scattering amplitudes. In many cases this renders previously impossible field theory computations trivial and helps scientists to carry out the precision calculations needed for understanding physics at the Large Hadron Collider. I will give a broad overview of these developments, highlighting the main conceptual ideas and touch on recent insights from string theory and twistor theory.