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We develop a model free energy from an expansion that basically includesgraphs without loops. From this calculation, we derive the temperaturedependence of the density (or specific volume), the typical time scale of the$\alpha$-relaxation, and the heat capacity. From this, we argue that the glasstransition is dominated by the vicinity of a first order phase transition. Thefluctuations, observable in principle as scattering, would support the findingsand would increase in terms of amplitude close to the phase boundary (while thesize stays constant). This amplitude is connected to the cluster size, alsointroduced in the cooperativity argument. Minor arguments about correctionsfrom loops are discussed where we also might have found an argument for the"Boson Peak". The whole concept then bases on equilibrium arguments that areinhibited by -- to our view -- the fluctuations (high susceptibility) plus thehigh density that results in the strong growing of the cluster size.

A model free energy for glasses