Triangle Seminars
Thursday, 17 Apr 2014
The geometry of on-shell diagrams
Alberto Mariotti
(Durham University)
Abstract:
I will review the connection between on-shell diagram formulation of N=4 scattering amplitudes,
the Grassmannian, and N=1 bipartite field theories.
I will then perform a detailed investigation of the combinatorial and geometric objects associated
to bipartite graphs, focusing on toric geometry and on the stratification of the Grassmannian.
I will show how this description extends to the non-planar case, providing powerful tools to
study the on-shell formulation of scattering amplitudes beyond the planar limit.
I will review the connection between on-shell diagram formulation of N=4 scattering amplitudes,
the Grassmannian, and N=1 bipartite field theories.
I will then perform a detailed investigation of the combinatorial and geometric objects associated
to bipartite graphs, focusing on toric geometry and on the stratification of the Grassmannian.
I will show how this description extends to the non-planar case, providing powerful tools to
study the on-shell formulation of scattering amplitudes beyond the planar limit.
Posted by: QMW