45 citations · 345 across the 22 of their papers we have counts for
5 papers · 1 filter
The Wilson-loop representation for Feynman integrals
Song He, Zhenjie Li, Yichao Tang +1
We introduce and study the Wilson-loop representation of certain Feynman integrals for scattering amplitudes in SYM and beyond, which makes their evaluat…
The symbol and alphabet of two-loop NMHV amplitudes from equations
Song He, Zhenjie Li, Chi Zhang
We study the symbol and the alphabet for two-loop NMHV amplitudes in planar super-Yang-Mills from the equations, which provide a first-principle method for c…
A Note on Letters of Yangian Invariants
Song He, Zhenjie Li
Motivated by reformulating Yangian invariants in planar SYM directly as forms on momentum-twistor space, we propose a purely algebraic problem of determining t…
Stringy canonical forms and binary geometries from associahedra, cyclohedra and generalized permutohedra
Song He, Zhenjie Li, Prashanth Raman +1
Stringy canonical forms are a class of integrals that provide -deformations of the canonical form of any polytopes. For generalized associahedra of finite-type cluster algebra,…
Blowing up Stringy Canonical Forms: An Algorithm to Win a Simplified Hironaka's Polyhedra Game
Zhenjie Li, Chi Zhang
We provide an efficient method of blowing up to compute leading order contributions of the recently introduced stringy canonical forms. The method is related to the well-known Hiro…