Seminar
Speaker
In this talk, we will review some recent ideas to extend the positive geometry program to multi-scalar field amplitudes with scalar fields having distinct masses. In particular, we will analyze scattering involving two scalars with unequal masses and find the class of polytopes whose volume generates S-matrix for such theories. We will also argue that  integrating out the heavier field" induces a map between different accordiohedra, thus giving some preliminary insight into geometrisation of effective field theory.