String Spectrum of 1+1-Dimensional Large N QCD with Adjoint Matter

Details String Spectrum of 1+1-Dimensional Large N QCD with Adjoint Matter String Spectrum of 1+1-Dimensional Large N QCD with Adjoint Matter

1992-09-14

arxiv.org/abs/hep-th/9209049v1

Phys.Rev. D47 (1993) 2517-2527

Physics

High Energy Physics

High Energy Physics - Theory

20 pages (7 figures available from authors as postscipt files), PUPT-1342

Scientific paper

10.1103/PhysRevD.47.2517

We propose gauging matrix models of string theory to eliminate unwanted non-singlet states. To this end we perform a discretised light-cone quantisation of large N gauge theory in 1+1 dimensions, with scalar or fermionic matter fields transforming in the adjoint representation of SU(N). The entire spectrum consists of bosonic and fermionic closed-string excitations, which are free as N tends to infinity. We analyze the general features of such bound states as a function of the cut-off and the gauge coupling, obtaining good convergence for the case of adjoint fermions. We discuss possible extensions of the model and the search for new non-critical string theories.

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