The boson-boson bound state in the massive Schwinger model

Abstract

We use (fermion) mass perturbation theory for the massive Schwinger model to compute the boson-boson bound state mass in lowest order. For small fermion mass the lowest possible Fock state turns out to give the main contribution and leads to a second order result for the bound state mass.

Comments: 8 pages, LATEX file, 7 figures, needed macro: psbox.tex