Glueball correlators as holograms

Abstract

We investigate the dynamical content of both hard- and soft-wall approximations to holographic QCD by deriving the corresponding glueball correlation functions and by confronting them with a variety of QCD results. We further calculate the glueball decay constants in both holographic duals, discuss emerging limitations and improvement strategies, and comment on a recent attempt to generalize the glueball correlator in the soft-wall background.

Comments: 12 pages. Invited talk presented at the 8th Conference on Continuous Advances in QCD, Minneapolis, Minnesota, May 15-18, 2008