Cosmological Implications of the Supergravity Tracking Potential

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It is demonstrated that any realistic model of quintessence should be based on Supergravity since, when the scalar field is on tracks today, Q≈ m Pl. This improves the agreement between theoretical predictions and the current observations. In particular, a generic property is that ratio ω Q≡ p Q/ρ Q is pushed towards -1. A string-inspired model is proposed where the potential is given by V(Q)= Λ⁴⁺αQαeκ2Q². The model predicts ω Q≈ -0.82, a value less that one sigma from the current likehood value.