USp(2k) Matrix Model: Schwinger-Dyson Equations and Closed-Open String Interactions
H. Itoyama, A. Tsuchiya
Abstract
We derive the Schwinger-Dyson/loop equations for the USp(2k) matrix model which close among the closed and open Wilson loop variables. These loop equations exhibit a complete set of the joining and splitting interactions required for the nonorientable Type I superstrings. The open loops realize the SO(2nf) Chan-Paton factor and their linearized loop equations derive the mixed Dirichlet/Neumann boundary conditions.
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