Relativistic theories of interacting fields and fluids

Physics – High Energy Physics – High Energy Physics - Phenomenology

Scientific paper

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17 pages, no figures, minor corrections made

Scientific paper

10.1103/PhysRevD.63.103507

We investigate divergence-type theories (DTT) describing the dissipative interaction between a field and a fluid. We look for theories which, under equilibrium conditions, reduce to the theory of a Klein-Gordon scalar field and a perfect fluid. We show that the requirements of causality and positivity of entropy production put non-trivial constarints to the structure of the interaction terms. These theories provide a basis for the phenomonological study of the reheating period.

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