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arXiv 0811.0099astro-ph
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暗物质能在暗能量中衰变吗？

Can Dark Matter Decay in Dark Energy?

S. H. Pereira, J. F. Jesus

备注：
Matches the published version. Section V changed. Formalism and main conclusion unchanged
发表信息：
Phys. Rev. D 79, 043517 (2009)
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摘要：

我们从物理学的角度分析了暗能量和暗物质之间的相互作用。通过假设它们具有不同的温度，我们研究了发生从暗物质到暗能量的衰变的可能性，其特征在于负参数$Q$。我们发现，如果至少有一种流体具有非零的化学势，例如$μ_x<0$和$μ_{dm}=0$或$μ_x=0$和$μ_{dm}>0$，衰变是可能的，其中$μ_x$和$μ_{dm}$分别是暗能量和暗物质的化学势。利用最近的宇宙学数据，我们发现，对于一个相当简单的相互作用，暗物质衰变是有利于与概率$\sim 93%$超过暗能量衰变。这一结果来自仅考虑背景演变的可能性分析。

英文摘要：

We analyze the interaction between Dark Energy and Dark Matter from a thermodynamical perspective. By assuming they have different temperatures, we study the possibility of occurring a decay from Dark Matter into Dark Energy, characterized by a negative parameter $Q$. We find that, if at least one of the fluids has non vanishing chemical potential, for instance $μ_x<0$ and $μ_{dm}=0$ or $μ_x=0$ and $μ_{dm}>0$, the decay is possible, where $μ_x$ and $μ_{dm}$ are the chemical potentials of Dark Energy and Dark Matter, respectively. Using recent cosmological data, we find that, for a fairly simple interaction, the Dark Matter decay is favored with a probability of $\sim 93%$ over the Dark Energy decay. This result comes from a likelihood analysis where only background evolution has been considered.

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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