Amplituhedron for IR Finite Amplitudes - Lecture 2

In this lecture, Jaroslav Trnka explores the Amplituhedron framework for infrared finite amplitudes as part of the "Positive Geometry in Scattering Amplitudes and Cosmological Correlators" program. Delve into advanced mathematical aspects of scattering amplitudes and their connection to positive geometry, including the Amplituhedron, positive Grassmannian, and Associahedron. This second lecture in the series builds upon the foundations of perturbative on-shell scattering amplitudes, examining how these structures contribute to a reformulation of the perturbative S-matrix using novel principles. The presentation connects theoretical physics concepts that bridge scattering amplitudes and cosmological correlators, offering insights into the mathematical frameworks that help describe fundamental physics. Organized by experts from the International Centre for Theoretical Sciences including Nima Arkani-Hamed, Johannes Henn, Suvrat Raju, and Jaroslav Trnka himself, this lecture is part of a broader workshop bringing together specialists from different disciplines to advance connections between seemingly disparate fields of theoretical physics.