635 citations · 2.8k across the 29 of their papers we have counts for
4 papers · 1 filter
Einstein-Yang-Mills Scattering Amplitudes From Scattering Equations
Freddy Cachazo, Song He, Ellis Ye Yuan
We present the building blocks that can be combined to produce tree-level S-matrix elements of a variety of theories with various spins mixed in arbitrary dimensions. The new formu…
Are Soft Theorems Renormalized?
Freddy Cachazo, Ellis Ye Yuan
We show that the distributional nature of soft theorems requires the soft limit expansion to take priority over the regulator expansion of Feynman loop integrals. We start the stud…
α'-Expansion of Open String Disk Integrals via Mellin Transformations
Ellis Ye Yuan
Open string disk integrals are represented as contour integrals of a product of Beta functions by using Mellin transformations. This makes the mathematical problem of computing the…
N-Point Tree-Level Scattering Amplitude in the New Berkovits' String
Humberto Gomez, Ellis Ye Yuan
We give a proof by direct computation that at tree level, the twistor-like superstring theory in the pure spinor formalism proposed very recently by Berkovits describes ten-dimensi…