Glueball Mass Spectrum from Supergravity

TL;DR

This paper reviews how supergravity duality can be used to calculate glueball mass spectra in non-supersymmetric Yang-Mills theory, showing good agreement with lattice results and exploring modifications to decouple unwanted states.

Contribution

It demonstrates a method to compute glueball masses via supergravity duality and introduces a modified approach to improve the spectrum's relevance by decoupling Kaluza-Klein states.

Findings

Supergravity calculations match lattice glueball masses unexpectedly well.

Modified duality with rotating branes reduces Kaluza-Klein contamination.

Method provides a new tool for non-perturbative gauge theory spectrum analysis.

Abstract

We review the calculation of the spectrum of glueball masses in non-supersymmetric Yang-Mills theory using the conjectured duality between supergravity and large N gauge theories. The glueball masses are obtained by solving the supergravity wave equations in a black hole geometry. The glueball masses found this way are in unexpected agreement with the available lattice data. We also show how to use a modified version of the duality based on rotating branes to calculate the glueball mass spectrum with some of the Kaluza-Klein states of the supergravity theory decoupled from the spectrum.