An Introduction to Webs

摘要: Webs are sets of Feynman diagrams that contribute to the exponents scattering amplitudes, in kinematic limit which emitted radiation is soft. As such, they have a number phenomenological and formal applications, offer tantalising glimpses into all-order structure perturbative quantum field theory. This article based on series lectures given graduate students, aims provide pedagogical introduction webs. Topics covered include exponentiation (non-)abelian gauge theories, web mixing matrix formalism for non-abelian recent progress calculation diagrams. Problems included throughout text, aid understanding.