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Explore a comprehensive lecture on "Positive Geometry in Cosmology" delivered by Nima Arkani-Hamed at the International Centre for Theoretical Sciences. This 1 hour 51 minute presentation is the first lecture in a program focused on Positive Geometry in Scattering Amplitudes and Cosmological Correlators. Delve into the fascinating intersection of mathematical aspects of scattering amplitudes and cosmology, examining how recent advances in perturbative on-shell scattering amplitudes—including unitarity methods, recursion relations, worldsheet models, bootstrap methods, and connections to positive geometry—relate to cosmological correlators that capture the fundamental physics of our universe. Part of a two-week workshop organized by leading experts Nima Arkani-Hamed, Johannes Henn, Suvrat Raju, and Jaroslav Trnka, this lecture contributes to the ongoing effort to reformulate perturbative S-matrix using novel principles and strengthen connections between theoretical physics disciplines.
