A. B. Pavan, E. Abdalla, S. Micheletti, E. G. M. Ferreira, J. C. C. de Souza
We extend the First Order Formalism for cosmological models, developed including an interaction between a fermionic and a scalar field. Cosmological exact solutions, describing universes filled with interacting dark energy and dark matter, have been obtained. We suggest some alternative couplings that yield solutions for the scalar field that could model the present expansion of our universe.
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http://arxiv.org/abs/1111.6526
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