Loop Integrands from Lightcone Geometries

A 13-minute lecture on "Loop Integrands from Lightcone Geometries" presented by Jonah Stalknecht at the International Centre for Theoretical Sciences as part of the "Positive Geometry in Scattering Amplitudes and Cosmological Correlators" program. Explore the mathematical connections between perturbative on-shell scattering amplitudes and cosmological correlators through the lens of positive geometry. This presentation contributes to the broader workshop goal of bridging two different disciplines in theoretical physics, examining how structures like positive Grassmannian, Associahedron, and the Amplituhedron are pushing toward a reformulation of the perturbative S-matrix using novel principles. The workshop, organized by Nima Arkani-Hamed, Johannes Henn, Suvrat Raju, and Jaroslav Trnka, brings together experts from both fields to advance these connections further.