Does DLCQ S-matrix have a covariant continuum limit?

Details Does DLCQ S-matrix have a covariant continuum limit? Does DLCQ S-matrix have a covariant continuum limit?

2001-06-19

arxiv.org/abs/hep-th/0106167v1

Mod.Phys.Lett. A16 (2001) 2177-2185

Physics

High Energy Physics

High Energy Physics - Theory

4 pages, 2 figures

Scientific paper

10.1142/S0217732301005588

We develop a systematic DLCQ perturbation theory and show that DLCQ S-matrix
does not have a covariant continuum limit for processes with $p^+=0$ exchange.
This implies that the role of the zero mode is more subtle than ever considered
in DLCQ and hence must be treated with great care also in non-perturbative
approach. We also make a brief comment on DLCQ in string theory.

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