arXiv 0909.09492009-09-04hep-ph

暗物质轴子

Dark matter axions

P. Sikivie

备注：: 12 pages, invited talk at the Workshop `Crossing the Boundaries: Gauge Dynamics at Strong Coupling' in honor of Misha Shifman's 60th birthday, March 14-17, 2009, in Minneapolis, MN
DOI：: 10.1142/S0217751X10048846

摘要：

大约30年前，米沙·希夫曼和其他人提出了一个“看不见的”轴子的假设。这是一个非常富有成果的想法，它跨越了粒子物理学、天体物理学和宇宙学的界限。质量为$10^{-5}$ eV（具有很大的不确定性）的轴子是宇宙中暗物质的主要候选者之一。最近发现，暗物质轴子热化形成玻色-爱因斯坦凝聚体（BEC）。因为它们形成BEC，轴子在结构形成的非线性状态和进入视界时不同于普通的冷暗物质（CDM）。轴子BEC提供了一种机制，生产净整体旋转的暗物质晕，并为宇宙微波各向异性多极的排列。因为有证据证明这些现象，无法用普通的CDM来解释，所以可以提出暗物质是轴子的论点。

英文摘要：

The hypothesis of an `invisible' axion was made by Misha Shifman and others, approximately thirty years ago. It has turned out to be an unusually fruitful idea, crossing boundaries between particle physics, astrophysics and cosmology. An axion with mass of order $10^{-5}$ eV (with large uncertainties) is one of the leading candidates for the dark matter of the universe. It was found recently that dark matter axions thermalize and form a Bose-Einstein condensate (BEC). Because they form a BEC, axions differ from ordinary cold dark matter (CDM) in the non-linear regime of structure formation and upon entering the horizon. Axion BEC provides a mechanism for the production of net overall rotation in dark matter halos, and for the alignment of cosmic microwave anisotropy multipoles. Because there is evidence for these phenomena, unexplained with ordinary CDM, an argument can be made that the dark matter is axions.

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英文摘要：

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