Fermionic cosmologies with Yukawa type interactions
Dec, 2010
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Abstract: (arXiv)
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.Note:
- 4 pages, 3 figures. To appear in Europhysics Letters
- 98.80.Jk
- 98.80.-k
- 98.80.Cq
- potential: Yukawa
- space-time: Robertson-Walker
- expansion: acceleration
- Jona-Lasinio-Nambu model
- deceleration
- field theory: scalar
- field theory: spinor
References(26)
Figures(3)