The singularities of Selberg- and Dotsenko-Fateev-like integrals

Abstract

We discuss the meromorphic continuation of certain hypergeometric integrals modeled on the Selberg integral, including the 3-point and 4-point functions of BPZ's minimal models of 2D CFT as described by Felder and Silvotti and Dotsenko and Fateev (the ``Coulomb gas formalism''). This is accomplished via a geometric analysis of the singularities of the integrands. In the case that the integrand is symmetric (as in the Selberg integral itself) or, more generally, what we call ``DF-symmetric,'' we show that a number of apparent singularities are removable, as required for the construction of the minimal models via these methods.

58 pages. Published version

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• Combinatorics and Topology of Kawai-Lewellen-Tye Relations
• Monodromy relations from twisted homology
• A solution space for a system of null-state partial differential equations 2
• A solution space for a system of null-state partial differential equations 4

Cited by in corpus (1)

• Fusion rules and rigidity for weight modules over the simple admissible affine $\mathfrak{sl}(2)$ and $\mathcal{N}=2$ superconformal vertex operator superalgebras