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arXiv 2408.08356hep-phastro-ph.CO
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基于与超导类比的冷暗物质

Cold Dark Matter Based on an Analogy with Superconductivity

Guanming Liang, Robert R. Caldwell

备注：
6 pages, 3 figures, comments welcome! Revised to match published version
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AI总结：

本文借超导类比提出由手征对称性破缺费米子的库珀对凝聚构成的冷暗物质候选者，重建其热历史并给出可由CMB与大尺度结构检验的衰减预言。

摘要：

我们提出了一种新颖的冷暗物质候选者，它由手征对称性破缺的相互作用费米子理论中的凝聚库珀对组成。通过建立从早期辐射时代到今天的热历史，我们证明费米子在高温下表现得像标准辐射，但随后经历一个比辐射衰减更快的临界时代，类似于冻结（freeze-out），这决定了遗迹丰度。通过二阶相变，费米子–反费米子对发生凝聚，系统渐近趋向零温和零压。到当今时代，这种非相对论性的大质量凝聚物比标准情形衰减得略快——这是一个独特的预言，可通过宇宙微波背景与大尺度结构的联合测量加以检验。我们还表明，在大质量费米子情形下，相变受到阻抑，反而留下一个残余的、长寿命的暗能量来源。

英文摘要：

We present a novel candidate for cold dark matter consisting of condensed Cooper pairs in a theory of interacting fermions with broken chiral symmetry. Establishing the thermal history from the early radiation era to the present, the fermions are shown to behave like standard radiation at high temperatures, but then experience a critical era decaying faster than radiation, akin to freeze-out, which sets the relic abundance. Through a second-order phase transition, fermion-antifermion pairs condense and the system asymptotes toward zero temperature and pressure. By the present era, the nonrelativistic, massive condensate decays slightly faster than in the standard scenario--a unique prediction that may be tested by combined measurements of the cosmic microwave background and large scale structure. We also show that in the case of massive fermions, the phase transition is frustrated, and instead leaves a residual, long-lived source of dark energy.

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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