States of non-zero ghost number in $c<1$ matter coupled to 2d gravity

Details States of non-zero ghost number in $c<1$ matter coupled to 2d gravity States of non-zero ghost number in $c<1$ matter coupled to 2d gravity

1991-12-14

arxiv.org/abs/hep-th/9112033v1

Mod.Phys.Lett.A7:1063-1078,1992

Physics

High Energy Physics

High Energy Physics - Theory

16 pages (without figures)

Scientific paper

10.1142/S021773239200094X

We study $c<1$ matter coupled to gravity in the Coulomb gas formalism using the double cohomology of the string BRST and Felder BRST charges. We find that states outside the primary conformal grid are related to the states of non-zero ghost number by means of descent equations given by the double cohomology. Some aspects of the Virasoro structure of the Liouville Fock space are studied. As a consequence, states of non-zero ghost number are easily constructed by ``solving'' these descent equations. This enables us to map ghost number conserving correlation functions involving non-zero ghost number states into those involving states outside the primary conformal grid.

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