Comments on Worldsheet Description of the Omega Background

Details Comments on Worldsheet Description of the Omega Background Comments on Worldsheet Description of the Omega Background

2011-06-27

arxiv.org/abs/1106.5503v1

Physics

High Energy Physics

High Energy Physics - Theory

11 pages

Scientific paper

Nekrasov's partition function is defined on a flat bundle of R^4 over S^1 called the Omega background. When the fibration is self-dual, the partition function is known to be equal to the topological string partition function, which computes scattering amplitudes of self-dual gravitons and graviphotons in type II superstring compactified on a Calabi-Yau manifold. We propose a generalization of this correspondence when the fibration is not necessarily self-dual.

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