Dark Matter and Dark Energy from the solution of the strong CP problem

被引：0

作者：

Mainini, Roberto ^{[1
]}

Colombo, Loris ^{[1
]}

Bonometto, Silvio ^{[1
]}

机构：

[1] Univ Milan, Phys Dept G Occhialini, INFN, Sezione Milano, Piazza Sci 3, I-20126 Milan, Italy

来源：

DARK SIDE OF THE UNIVERSE | 2006年 / 878卷

关键词：

cosmology; theory-dark matter-clementary particles;

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The strong CP problem was solved by Peccei & Quinn by introducing axions, which are a viable candidate for Dark Matter (DM). Here the PQ approach is modified so to yield also Dark Energy (DE), which arises in fair proportions, without tuning any extra parameter. DM and DE arise from a single scalar field and, in the present ecpoch, are weakly coupled. Fluctuations have a fair evolution. The model is also fitted to WMAP first-year release, using a Markov Chain Monte Carlo technique, and performs as well as ACDM, coupled or uncoupled DE. Best-fit cosmological parameters for different models are mostly within 2-sigma level. The main peculiarity of the model is to favor high values of the Hubble parameter.

引用

页码：254 / +

页数：2

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