CPT Student Seminar: The CHY formalism for massless scattering
13 February 2017 17:00 in OC218
The Cachazo-He-Yuan (CHY) formalism is a 2d CFT (string theory) which allows the
computation of scattering amplitudes. It is equivalent to, and at the same time fundamentally different from, the perturbative treatment of quantum field theory using Feynman diagrams (up to tree-level). It deals in particular with the scattering of n massless particles in an arbitrary D-dimensional flat space-time. This is achieved by a map from momentum space to the Riemann sphere with punctures. Starting from this map, I will discuss the so-called Scattering Equations, the proof for their polynomial form by Dolan and Goddard, and their general solution in terms of the determinant of a (n−3)!×(n−3)! matrix. Finally, I will discuss of how the scattering amplitudes can be obtained.
Contact Daniel Martin
A gathering of mathematicians from the CPT group with physicists from IPPP, we meet to discuss our work in a relaxed and friendly environment.
An archive of previous years talks is kept here.