Volume 97, Number 4, February 2012
|Number of page(s)||5|
|Section||Geophysics, Astronomy and Astrophysics|
|Published online||20 February 2012|
Fermions in a Walecka-type cosmology
Departamento de Física, Universidade Tecnológica Federal do Paraná - Curitiba, Brazil
2 Departamento de Física, Universidade Federal do Paraná - Curitiba, Brazil
Accepted: 13 January 2012
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.
PACS: 98.80.-k – Cosmology / 98.80.Jk – Mathematical and relativistic aspects of cosmology
© EPLA, 2012
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