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arXiv 0807.4590astro-phgr-qchep-phhep-th
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暗物质相互作用能替代暗能量吗？

Could Dark Matter Interactions be an Alternative to Dark Energy ?

S. Basilakos, M. Plionis

备注：
7 pages, 2 figures, Accepted for publication by Astronomy & Astrophysics, major revision
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摘要：

我们在相互作用暗物质（IDM）的框架内研究宇宙的全球动力学。假设暗物质服从碰撞玻尔兹曼方程，我们可以得到全局密度演化的解析解，它可以容纳加速膨胀，等价于{ \em quintessence}或标准$Λ$模型，当前时间位于拐点之后。这是可能的，如果有一个DM粒子的创建和湮灭过程与前一个过程占主导地位，创建一个有效的源项与负压之间的不平衡。比较预测的哈勃膨胀的IDM模型之一（最简单的）与观测数据，我们发现，有效的湮灭项是相当小的，所建议的各种其他最近的实验。

英文摘要：

We study the global dynamics of the universe within the framework of the Interacting Dark Matter (IDM) scenario. Assuming that the dark matter obeys the collisional Boltzmann equation, we can derive analytical solutions of the global density evolution, which can accommodate an accelerated expansion, equivalent to either the {\em quintessence} or the standard $Λ$ models, with the present time located after the inflection point. This is possible if there is a disequilibrium between the DM particle creation and annihilation processes with the former process dominating, which creates an effective source term with negative pressure. Comparing the predicted Hubble expansion of one of the IDM models (the simplest) with observational data we find that the effective annihilation term is quite small, as suggested by a variety of other recent experiments.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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