Issue |
EPL
Volume 93, Number 1, January 2011
|
|
---|---|---|
Article Number | 19002 | |
Number of page(s) | 4 | |
Section | Geophysics, Astronomy and Astrophysics | |
DOI | https://doi.org/10.1209/0295-5075/93/19002 | |
Published online | 28 January 2011 |
Fermionic cosmologies with Yukawa-type interactions
1
Departamento de Física, Universidade Tecnológica Federal do Paraná - Curitiba, Brazil
2
Departamento de Física, Universidade Federal do Paraná - Curitiba, Brazil
a
gravitam@yahoo.com
b
devecchi@fisica.ufpr.br
c
kremer@fisica.ufpr.br
Received:
9
December
2010
Accepted:
20
December
2010
In this work we discuss if fermionic sources could be responsible for accelerated periods in a Friedmann-Robertson-Walker spatially flat universe, including a usual self-interaction potential of the Nambu-Jona-Lasinio type together with a fermion-scalar interaction potential of the Yukawa type. The results show that the combination of these potentials could promote an initially accelerated period, going through a middle decelerated era, with a final eternal accelerated period, where the self-interaction contribution dominates.
PACS: 98.80.-k – Cosmology / 98.80.Cq – Particle-theory and field-theory models of the early Universe (including cosmic pancakes, cosmic strings, chaotic phenomena, inflationary universe, etc.) / 98.80.Jk – Mathematical and relativistic aspects of cosmology
© EPLA, 2011
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