Table 8.2: Results of the model for hadron yields at √$_{s}$ = 91 . 2 GeV (centre column) and √$_{s}$ ∼ 30 GeV (right column). The relevant 3+1 free parameter values are shown in the final row. 8.6 Conclusions We assumed that every hadron in QCD can in principal be represented by a function in the r coordinate of the 5D holographic theory of QCD. We then proposed that hadronization can be modelled by hypothesising that the initial yield (that is before the particle created starts decaying) for any hadron is given by the square of the overlap between the function which represents the hadron, and a Gaussian, centred at the origin, with a width of Λ. In addition we have two other parameters in the theory; a strangeness suppression factor to account for the heaviness of the strange quark, and κ which determines with what energy the particles leave the interaction point. With the full holographic dual to QCD currently unknown, we made some ad hoc assumptions to achieve a full set of functions which represented 118 Hadron Model Expt Model Expt π + 5.95 8.5 4.07 5.35 π 0 6.43 9.2 4.41 5.3 K + 1.09 1.2 0.68 0.7 K 0 1.09 1.0 0.68 0.69 η 1.06 0.93 0.66 0.584 ρ 0 1.33 1.2 0.88 0.9 K ∗ + 0.387 0.36 0.28 0.31 K ∗ 0 0.385 0.37 0.28 0.28 η ′ 0.042 0.13 0.03 0.26 p 0.41 0.406 0.30 0.3 φ 0.03 0.1 0.02 0.084 Λ 0.172 0.19 0.13 0.0983 Σ ∗ $^{+}$+Σ ∗− 2 0.0120 0.0094 0.0089 0.0083 Ξ − 0.012 0.012 0.0088 0.0083 Ξ ∗ 0 0.0040 0.0033 n/a n/a Ω 0.0011 0.0014 0.0008 0.007 Λ (MeV) , κ (GeV) , γ$_{s}$, R 150, 4.96, 0.97, 2.6 152, 2.35, 0.97, 2.4