Decay widths in the massive Schwinger model

TL;DR

This paper investigates the massive Schwinger model, revealing additional hybrid bound states and calculating decay widths for specific states, enhancing understanding of its spectrum and decay processes.

Contribution

It introduces hybrid bound states into the massive Schwinger model and explicitly computes their decay widths, which were not previously analyzed.

Findings

Identification of hybrid bound states in the model

Explicit decay width calculations for three-boson and hybrid states

Enhanced understanding of the model's spectrum and decay mechanisms

Abstract

By a closer inspection of the massive Schwinger model within mass perturbation theory we find that, in addition to the $n$-boson bound states, a further type of hybrid bound states has to be included into the model. Further we explicitly compute the decay widths of the three-boson bound state and of the lightest hybrid bound state.