Fermions in a Walecka-type cosmology

被引：15
|
作者：
Ribas, M. O. [1 ]
Zambianchi, P., Jr. [1 ]
Devecchi, F. P. [2 ]
Kremer, G. M. [2 ]
机构：
[1] Univ Tecnol Fed Parana, Dept Fis, Curitiba, Parana, Brazil
[2] Univ Fed Parana, Dept Fis, BR-80060000 Curitiba, Parana, Brazil
来源：
EPL | 2012年 / 97卷 / 04期
关键词：
INFLATION; UNIVERSE; DRIVEN; SPINOR;
D O I：
10.1209/0295-5075/97/49003
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
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. Copyright (C) EPLA, 2012
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页数：5
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