Geometric transitions, Chern-Simons gauge theory and Veneziano type amplitudes

Abstract

We consider the geometric transition and compute the all-genus topological string amplitudes expressed in terms of Hopf link invariants and topological vertices of Chern-Simons gauge theory. We introduce an operator technique of 2-dimensional CFT which greatly simplifies the computations. We in particular show that in the case of local Calabi-Yau manifolds described by toric geometry basic amplitudes are written as vacuum expectation values of a product vertex operators and thus appear quite similar to the Veneziano amplitudes of the old dual resonance models. Topological string amplitudes can be easily evaluated using vertex operator algebra.

arXiv comment16 pages, 2 figures, (v2,3) minor changes, to appear in Phys. Lett. B

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• $q$-Difference Kac-Schwarz Operators in Topological String Theory
• Affine SU(N) algebra from wall-crossings
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