Speaker
Giulio Gambuti
(University of Oxford)
Description
In this talk I will report on a recent analysis of soft divergences of entire scattering amplitudes within the Schwinger-parameter representation of Feynman integrals. Using tools from tropical geometry and graph theory, I will show how soft and hard contributions factorise directly in parameter space and how “worldline” Schwinger variables make exponentiation of soft divergences manifest at the integrand level.