ON TOPOLOGICAL $2D$ STRING AND INTERSECTION THEORY

Details ON TOPOLOGICAL $2D$ STRING AND INTERSECTION THEORY ON TOPOLOGICAL $2D$ STRING AND INTERSECTION THEORY

1995-02-09

arxiv.org/abs/hep-th/9502058v1

Phys.Lett.B355:135-140,1995

Physics

High Energy Physics

High Energy Physics - Theory

Latex, 10 pages, no figures

Scientific paper

10.1016/0370-2693(95)00740-C

The topological description of $2D$ string theory at the self-dual radius is studied in the algebro-geometrical formulation of the $A_{k+1}$ topological models at $k=-3$. Genus zero correlators of tachyons and their gravitational descendants are computed as intersection numbers on moduli space and compared to $2D$ string results. The interpretation of negative momentum tachyons as gravitational descendants of the cosmological constant, as well as modifications of this, is shown to imply a disagreement between $2D$ string correlators and the associated intersection numbers.

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