QCD and a Holographic Model of Hadrons

We propose a five-dimensional framework for modeling low energy properties of QCD. In the simplest three parameter model we compute masses, decay rates and couplings of the lightest mesons. The model fits experimental data to within 5%. The framework is a holographic version of the QCD sum rules, motivated by the AdS/CFT correspondence. The model naturally incorporates properties of QCD dictated by chiral symmetry, which we demonstrate by deriving the Gell-Mann-Oakes-Renner relationship for the pion mass