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
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.