Separation of scattering and selfaction revisited

TL;DR

This paper revisits the definition of the scattering operator in Quantum Field Theory, emphasizing the importance of separating selfaction from interaction through a functional integral formalism and quantum equations of motion.

Contribution

It introduces a revised approach to defining the scattering operator by explicitly separating selfaction from interaction using functional integral methods.

Findings

Clarifies the role of selfaction in scattering processes

Proposes a formalism for separating selfaction from interaction

Enhances understanding of quantum equations of motion in scattering theory

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.