Renormal-order improvement of the Schwinger mass

Abstract

The massive Schwinger model may be analysed by a perturbation expansion in the fermion mass. However, the results of this mass perturbation theory are sensible only for sufficiently small fermion mass. By performing a renormal-ordering, we arrive at a chiral perturbation expansion where the expansion parameter remains small even for large fermion mass. We use this renormal-ordered chiral perturbation theory for a computation of the Schwinger mass and compare our results with lattice computations.

Latex file, 13 pages, 3 figures, needed macro: psbox.tex

References in corpus (5)

• Massive Schwinger model within mass perturbation theory
• Three topics in the Schwinger model
• Variational Mass Perturbation Theory for Light-Front Bound-State Equations
• Normalization of the chiral condensate in the massive Schwinger model
• Scattering processes in the massive Schwinger model

Cited by in corpus (2)

• Topological vacuum structure of the Schwinger model with matrix product states
• Improved vector and scalar masses in the massive Schwinger model