Nonperturbative Renormalization in Light-Cone Quantization

Physics – High Energy Physics – High Energy Physics - Phenomenology

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10 pages, LaTeX/RevTex, no figures, to appear in the proceedings of Orbis Scientiae 1997: Twenty-Five Coral Gables Conferences

Scientific paper

Two approaches to nonperturbative renormalization are discussed for theories quantized on the light cone. One is tailored specifically to a calculation of the dressed-electron state in quantum electrodynamics, where an invariant-mass cutoff is used as a regulator and a Tamm-Dancoff truncation is made to include no more than two photons. The other approach is based on Pauli-Villars regulators and is applied to Yukawa theory and a related soluble model. In both cases discretized light-cone quantization is used to obtain a finite matrix problem that can be solved nonperturbatively.

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