Koba-Nielsen local zeta functions, convex subsets, and generalized Selberg-Mehta-Macdonald and Dotsenko-Fateev-like integrals

Authors

• Willem Veys
• Wilson A. Zuniga-Galindo, The University of Texas Rio Grande ValleyFollow

Document Type

Article

Publication Date

6-5-2026

Abstract

The Koba-Nielsen local zeta functions are integrals depending on several complex parameters, used to regularize the Koba-Nielsen string amplitudes. These integrals are convergent and admit meromorphic continuations in the complex parameters. In the original case, the integration is carried out on the n-dimensional Euclidean space. In this work, the integration is over a variety of (bounded or unbounded) convex subsets; the resulting integrals also admit meromorphic continuations in the complex parameters. We describe the meromorphic continuation's polar locus explicitly, using the technique of embedded resolution. This result can be reinterpreted as saying that the meromorphic continuations are weighted sums of Gamma functions, evaluated at linear combinations of the complex parameters, where the weights are holomorphic functions. The integrals announced in the title of this paper occur as a particular case of these new Koba-Nielsen local zeta functions, or of a further generalization to arbitrary hyperplane arrangements.

Comments

Original published version available at https://doi.org/10.4310/CNTP.260606015350.

Recommended Citation

Veys, Willem, and W. A. Zúñiga-Galindo. “Koba-Nielsen Local Zeta Functions, Convex Subsets, and Generalized Selberg-Mehta-Macdonald and Dotsenko-Fateev-like Integrals.” Communications in Number Theory and Physics 20, no. 2 (2026): 353–90. https://doi.org/10.4310/CNTP.260606015350.

Publication Title

Communications in Number Theory and Physics

DOI

10.4310/CNTP.260606015350