What Can We Learn from QED at Large Couplings?

Details What Can We Learn from QED at Large Couplings? What Can We Learn from QED at Large Couplings?

2000-07-24

arxiv.org/abs/hep-th/0007182v1

AIP Conf.Proc. 539 (2000) 73-79

Physics

High Energy Physics

High Energy Physics - Theory

7 pages, Latex, including 3 figures; to appear in "Proceedings of the 3rd International Symposium on Symmetries in Subatomic P

Scientific paper

10.1063/1.1330904

In order to understand QCD at the energies relevant to hadronic physics one requires analytical methods for dealing with relativistic gauge field theories at large couplings. Strongly coupled quenched QED provides an ideal laboratory for the development of such techniques, in particular as many calculations suggest that - like QCD - this theory has a phase with broken chiral symmetry. In this talk we report on a nonperturbative variational calculation of the electron propagator within quenched QED and compare results to those obtained in other approaches. We find surprising differences among these results.

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