Towards Infrared Finite S-matrix in Quantum Field Theory
English | 2021 | ISBN: 9811630445 | 140 Pages | PDF EPUB | 10 MB
This book presents the better understanding of infrared structures of particle scattering processes in quantum electrodynamics (QED) in four-dimensional spacetime. An S-matrix is the fundamental quantity in scattering theory. However, if a theory involves massless particles, such as QED and gravity, the conventional S-matrix has not been well defined due to the infrared divergence, and infrared dynamics thus needs to be understood in-depth to figure out the S-matrix.