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arXiv · 2107.03656

Instanton counting and O-vertex

Satoshi Nawata·Rui-Dong Zhu
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Abstract

We present closed-form expressions of unrefined instanton partition functions for gauge groups of type $BCD$ as sums over Young diagrams. For $\mathrm{SO}(n)$ gauge groups, we provide a fivebrane web picture of our formula based on the vertex-operator formalism of the topological vertex with a new type called O-vertex for an O5-plane.

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Satoshi Nawata, Rui-Dong Zhu. 2023-01-31. Instanton counting and O-vertex. https://doi.org/10.1007/jhep09(2021)190

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