Logarithms and volumes of polytopes
Describing the geometry of the dual amplituhedron without reference to a particular triangulation is an open problem. In this note we introduce a new way of determining the volume of the tree-level NMHV dual amplituhedron. We show that certain contour integrals of logarithms serve as natural building blocks for computing this volume as well as the volumes of general polytopes in any dimension. These building blocks encode the geometry of the underlying polytopes in a triangulation-independent way, and make identities between different representations of the amplitudes manifest.
Keywords1/N Expansion Scattering Amplitudes Supersymmetric Gauge Theory
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- J.M. Henn and J.C. Plefka, Scattering Amplitudes in Gauge Theories, in Lecture Notes in Physics 883, Springer (2014).Google Scholar
- S. Huggett and K. Tod, An Introduction to Twistor Theory, Cambridge University Press, (1994).Google Scholar