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arXiv 1001.3418astro-ph.COgr-qchep-ph
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早期宇宙中变化的耦合：$α$和$G$的相关变化

Varying couplings in the early universe: correlated variations of $α$ and $G$

C. J. A. P. Martins, Eloisa Menegoni, Silvia Galli, Gianpiero Mangano, Alessandro Melchiorri

备注：
6 pages, 5 figures; one author added, now includes discussion of BBN constraints
发表信息：
Phys.Rev.D82:023532,2010
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摘要：

宇宙微波背景的各向异性提供了一个独特的机会，以限制同时变化的精细结构常数$α$和牛顿的引力常量$G$。这些相关的变化在广泛的理论模型中是可能的。在这篇简短的论文中，我们表明，目前的数据，假设粒子质量是恒定的，没有给出明确的指示，这种变化，但已经倾向于任何相对变化的$α$应该是相同的符号的$G$的变化的$\sim 1 %$。我们还表明，宇宙的互补性是目前与大爆炸核合成和当前CMB和BBN数据的组合强烈约束在$α$和$G$的同时变化。最后，我们讨论了未来的范围可实现的普朗克卫星任务。

英文摘要：

The Cosmic Microwave Background anisotropies provide a unique opportunity to constrain simultaneous variations of the fine-structure constant $α$ and Newton's gravitational constant $G$. Those correlated variations are possible in a wide class of theoretical models. In this brief paper we show that the current data, assuming that particle masses are constant, gives no clear indication for such variations, but already prefers that any relative variations in $α$ should be of the same sign of those of $G$ for variations of $\sim 1 %$. We also show that a cosmic complementarity is present with Big Bang Nucleosynthesis and that a combination of current CMB and BBN data strongly constraints simultaneous variations in $α$ and $G$. We finally discuss the future bounds achievable by the Planck satellite mission.

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