Due to the ongoing COVID-19 pandemic, the original program has been canceled. However, the meeting will be conducted through online lectures. Scattering amplitudes have played a central role in quantum field theory since its inception. Recent years have seen a remarkable advance in our understanding of scattering amplitudes, both for theoretical and phenomenological purposes. Apart from playing a prominent role in high-energy particle physics, these developments have far-reaching implications in a wide range; from hidden symmetries of gauge theories and gravity, to string perturbation and ambi-twistor strings, to new mathematics such as positive geometries. In particular, the search for a theory of S-Matrix has revealed surprising mathematical structures and new formulations underlying scattering amplitudes, with no reference to space and time. One line of research in the past decade has led to beautiful geometric formulations for all-loop scattering amplitudes in planar N=4 SYM, which...
