Renormal-order improvement of the Schwinger mass

Details Renormal-order improvement of the Schwinger mass Renormal-order improvement of the Schwinger mass

1998-06-25

arxiv.org/abs/hep-th/9806212v1

Int.J.Mod.Phys. A14 (1999) 4943-4952

Physics

High Energy Physics

High Energy Physics - Theory

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

Scientific paper

10.1142/S0217751X99002335

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.

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