Large N QCD from Rotating Branes

TL;DR

This paper uses supergravity models derived from rotating D-branes to study large N SU(N) Yang-Mills theory, showing that certain parameters decouple unwanted modes while preserving glueball mass ratios consistent with lattice results.

Contribution

It introduces a one-parameter family of supergravity models from rotating D-branes that effectively decouple Kaluza-Klein modes in large N QCD simulations.

Findings

Kaluza-Klein modes decouple with varying angular momentum

Glueball mass ratios remain stable and match lattice data

Topological susceptibility and gluon condensate vary with angular momentum

Abstract

We study large N SU(N) Yang-Mills theory in three and four dimensions using a one-parameter family of supergravity models which originate from non-extremal rotating D-branes. We show explicitly that varying this "angular momentum" parameter decouples the Kaluza-Klein modes associated with the compact D-brane coordinate, while the mass ratios for ordinary glueballs are quite stable against this variation, and are in good agreement with the latest lattice results. We also compute the topological susceptibility and the gluon condensate as a function of the "angular momentum" parameter.