Learning Scattering Amplitudes By Heart

The canonical forms associated to scattering amplitudes of planar Feynman diagrams are interpreted in terms of masses of projectives, defined as the modulus of their central charges, in the hearts of certain t-structures of derived categories of quiver representations and, equivalently, in terms of cluster tilting objects of the corresponding cluster categories. (C) 2021 The Authors. Published by Elsevier B.V.