Fermionic cosmologies with Yukawa-type interactions
Departamento de Física, Universidade Tecnológica Federal do Paraná - Curitiba, Brazil
2 Departamento de Física, Universidade Federal do Paraná - Curitiba, Brazil
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