4 papers
An All-Loop Amplituhedron in Two Dimensions
Jonah Stalknecht
We define and study a positive geometry which serves as a natural generalization of loop amplituhedra to two-dimensional Minkowski space . The geometry…
Which Functions Admit a Positive Geometry? From Branch Cuts to String Amplitudes
Hyungrok Kim, Jonah Stalknecht
Positive geometry provides a geometric framework where physical observables are encoded as canonical forms associated to regions of kinematic space. In this paper we consider a gen…
Positive Geometry for Stringy Scalar Amplitudes
Christoph Bartsch, Karol Kampf, David Podivin +1
We introduce a new positive geometry, the associahedral grid, which provides a geometric realization of the inverse string theory KLT kernel. It captures the full -dependence…
The Geometry of BCFW for ABJM Loop Integrands
Livia Ferro, Ross Glew, Tomasz Lukowski +1
In this paper we investigate the loop-level geometry of ABJM theory from the perspective of lightcone geometries in dual space. This geometry admits a natural fibration, where one…