fit (this parameter can be re-expressed as the average energy per hadron, κ , which we detail later). The width is also a free parameter which we fit. Finally the data displays a suppression factor on the production of strange quarks - this is not surprising since they are more massive. We reflect this factor in the underlying dynamics by a strangeness suppression factor γ$_{s}$ which multiplies the Gaussian for each strange quark in the hadron (note that if mixing occurs the strange quark content need not be an integer). γ$_{s}$ , which is also used in the thermal hadronization models [3], is another fit parameter in our analysis. For any collision with an initial energy of √$_{s}$$_{, no particle with a rest mass}$ greater than √$_{s}$ will be produced, so in principle we would need a cutoff which would depend on the centre of mass energy of the initial collision. In practice we shall simply include all known states with mass below 1.7 GeV. Above this value the experimental data on the full spectrum becomes patchy. In addition, the high mass states in this range are only produced with very small multiplicities and have a minimal effect on the lighter particle results. Since the a$_{0}$ (980) triplet is widely thought to be a bound kaon state [24] we include this as a decay channel, but not as a state that can be formed immediately after the annihilation. The final ingredient we require is a specific AdS/QCD model of the QCD hadrons. We will adapt a string theory derived model of chiral symmetry breaking, based on the Constable-Myers geometry of chapter 4 that includes the vector mesons and pions [69]. That both the vector mesons and the pions are included is an important feature: the mass spectra of the pseudo- Goldstone bosons are significantly different to all other hadrons in QCD. We will then assume that the g$_{n}$ functions associated with each hadron stack are not that different from the ρ -stack functions - we will simply reproduce them but with the mass of the lightest stack member tuned to the experimental 112