Global conformal blocks via Shadow formalism

Vladimir Belavin; J. Ramos Cabezas

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arXiv · 2401.02580

Global conformal blocks via Shadow formalism

Vladimir Belavin·J. Ramos Cabezas

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Abstract

We study $\mathfrak{sl}_2$ and $\mathfrak{sl}_3$ global conformal blocks on a sphere and a torus, using the shadow formalism. These blocks arise in the context of Virasoro and $\mathcal{W}_3$ conformal field theories in the large central charge limit. In the $\mathfrak{sl}_2$ case, we demonstrate that the shadow formalism yields the known expressions in terms of conformal partial waves. Then, we extend this approach to the $\mathfrak{sl}_3$ case and show that it allows to build simple integral representations for $\mathfrak{sl}_3$ global blocks. We demonstrate this construction on two examples: the four-point block on the sphere and the one-point torus block.

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Vladimir Belavin, J. Ramos Cabezas. 2024-01-04. Global conformal blocks via Shadow formalism. https://arxiv.org/abs/2401.02580

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