31 citations · 31 across the 15 of their papers we have counts for
17 papers
A mathematical perspective on nonplanar on-shell forms
Artyom Lisitsyn, Elizabeth Pratt, Melissa Sherman-Bennett +1
On-shell forms are differential forms on the Grassmannian which arise in particle physics. They are defined using bipartite graphs with distinguished ``boundary'' vertices. Mat…
Multi-Loop Negative Geometries
Lance J. Dixon, Umut Oktem, Shruti Paranjape +3
Scattering amplitudes in planar supersymmetric Yang-Mills theory are dual to expectation values of null polygonal Wilson loops. The Amplituhedron provides a geometric…
A Surface Integrand for the Inverse KLT Kernel
Christoph Bartsch, Karol Kampf, Jiří Novotný +1
We propose a loop-level generalization of the inverse string theory Kawai-Lewellen-Tye (KLT) kernel: the planar inverse KLT integrand. The integrand is defined constructively via a…
Grassmannian Geometries for Non-Planar On-Shell Diagrams
Artyom Lisitsyn, Umut Oktem, Melissa Sherman-Bennett +1
On-shell diagrams are gauge invariant quantities which play an important role in the description of scattering amplitudes. Based on the principles of generalized unitarity, they ar…
Tree-Level Gravity Amplitudes at Infinity
Justin Lemmon, Jaroslav Trnka
In this note we study on-shell tree-level gravity amplitudes in the infinite momentum limit. In the case of the two-line BCFW shift, we have a famous improved behavior at infinity…
Geometric Landau Analysis and Symbol Bootstrap
Dmitry Chicherin, Johannes Henn, Elia Mazzucchelli +3
We investigate how the positive geometry framework for loop integrands in super Yang-Mills theory constrains the structure of the integrated answers. This is done…