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Interaction of d=2 c=1 Discrete States from String Field Theory

I. Ya. Aref'eva, P. B. Medvedev, A. P. Zubarev

hep-tharXiv:hep-th/9212156

Abstract

Starting from string field theory for 2d gravity coupled to c=1 matter we analyze the off-shell tree amplitudes of discrete states. The amplitudes exhibit the pole structure and we use the off-shell calculus to extract the residues and prove that just the residues are constrained by the Ward Identities. The residues generate a simple effective action.

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