Quintessence models and the cosmological evolution of α -: art. no. 083503

被引：59
|
作者：
Lee, S [1 ]
Olive, KA
Pospelov, M
机构：
[1] Univ Minnesota, Sch Phys & Astron, Minneapolis, MN 55455 USA
[2] Univ Minnesota, William I Fine Theoret Phys Inst, Minneapolis, MN 55455 USA
[3] Univ Victoria, Dept Phys & Astron, Victoria, BC V8P 1A1, Canada
来源：
PHYSICAL REVIEW D | 2004年 / 70卷 / 08期
关键词：
D O I：
10.1103/PhysRevD.70.083503
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The cosmological evolution of a quintessencelike scalar field phi coupled to matter and gauge fields leads to effective modifications of the coupling constants and particle masses over time. We analyze a class of models where the scalar field potential V(phi) and the couplings to matter B(phi) admit common extremum in phi, as in the Damour-Polyakov ansatz. We find that even for the simplest choices of potentials and B(phi), the observational constraints on Deltaalpha/alpha coming from quasar absorption spectra, the Oklo phenomenon and Big Bang nucleosynthesis provide complementary constraints on the parameters of the model. We show the evolutionary history of these models in some detail and describe the effects of a varying mass for dark matter.
引用
收藏
页码：083503 / 1
页数：12
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