Infraparticle problem, asymptotic fields and Haag-Ruelle theory

TL;DR

This paper explores a generalized concept of particles in quantum field theory, proposing that asymptotic particles with well-defined mass can exist even without a traditional mass hyperboloid in the spectrum.

Contribution

It introduces a novel generalization of Wigner's particle concepts, allowing for the existence of asymptotic particles with definite mass without the standard spectral condition.

Findings

Asymptotic particles can have well-defined mass without a mass hyperboloid.

Generalized Wigner concepts enable new interpretations of particle states.

Potential implications for quantum field theory and particle physics.

Abstract

In this article we want to argue that an appropriate generalization of the Wigner concepts may lead to an asymptotic particle with well-defined mass, although no mass hyperboloid in the energy-momentum spectrum exists.