Fermions in a Walecka-type cosmology

Details Fermions in a Walecka-type cosmology Fermions in a Walecka-type cosmology

2012-01-13

arxiv.org/abs/1201.2901v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

8 pages, 4 figures. To appear in EPL

Scientific paper

A simplified Walecka-type model is investigated in a cosmological scenario. The model includes fermionic, scalar and vector fields as sources. It is shown that their interactions, taking place in a Robertson-Walker metric, could be responsible for the transition of accelerated-decelerated periods in the early universe and a current accelerated regime. It is also discussed the role of the fermionic field as the promoter of the accelerated regimes in the early and the late stages of the universe.

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