Power counting degree versus singular order in the Schwinger model

Details Power counting degree versus singular order in the Schwinger model Power counting degree versus singular order in the Schwinger model

1998-05-05

arxiv.org/abs/hep-th/9805022v1

Nuovo Cim. A111 (1998) 323-327

Physics

High Energy Physics

High Energy Physics - Theory

5 pages, LaTeX, no figures. To appear in Lett. Math. Phys

Scientific paper

The importance of a rigorous definition of the singular degree of a
distribution is demonstrated on the case of two-dimensional QED (Schwinger
model). Correct mathematical treatment of second order vacuum polarization in
the perturbative approach is crucial in order to obtain the Schwinger mass of
the photon by resummation.

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