Renormalizing DLCQ using supersymmetry

I. Filippov, S. Pinsky, J. R. Hiller

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


Recent string theory developments suggest the necessity to understand supersymmetric gauge theories non-perturbatively, in various dimensions. In this work we show that there is a standard Hamiltonian formulation that generates a finite and supersymmetric result at every order of the approximation scheme known as discrete light-c̀one quantization (DLCQ). We present this renormalized DLCQ Hamiltonian and find that it has two novel features: it automatically chooses the 't Hooft prescription for renormalizing the singularities, and it introduces irrelevant operators that serve to preserve the supersymmetry and improve the convergence. We solve for the bound states and the wave functions with and without the irrelevant operators and verify that with the irrelevant operator the exact large-Nc supersymmetric DLCQ (SDLCQ) results are reproduced. With the irrelevant operator removed, we show that the bound-state mass and wave functions appear to be converging to the SDLCQ results but very slowly. This is a first step in extending the advantages of SDLCQ to non-supersymmetric theories.

Original languageEnglish (US)
Pages (from-to)221-230
Number of pages10
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number1-2
StatePublished - May 3 2001

Bibliographical note

Funding Information:
This work was supported in part by the US Department of Energy. One of the authors (S.P) would like to acknowledge the hospitality of the Aspen Center of Physics where part of the work was completed. The authors would like to acknowledge conversations with U. Trittmann and O. Lunin.


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