Separation of scattering and selfaction revisited
arXiv:1003.4854
Abstract
The definition of scattering operator in Quantum Field Theory is critically reconsidered. The correct treatment of one-particle states is connected with separation of selfaction from interaction. The formalism of functional integral is used for the description of such a separation via introduction of the quantum equation of motion.
Contribution to the volume "Subtleties of Quantum Field Theory", dedicated to the aniversary of Lev Lipatov, edited by D.Diakonov