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Extra States in C<1 String Theory

Sunil Mukhi

hep-tharXiv:hep-th/9111013

Abstract

A construction of elements of the BRS cohomology of ghost number +/- 1 in c<1 string theory is described, and their two-point function computed on the sphere. The construction makes precise the relation between these extra states and null vectors. The physical states of ghost number +1 are found to be exact forms with respect to a ``conjugate'' BRS operator.

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