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arXiv 1402.7335hep-phastro-ph.CO
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3.55 keV暗示衰变的轴子状粒子暗物质

A 3.55 keV hint for decaying axion-like particle dark matter

Joerg Jaeckel, Javier Redondo, Andreas Ringwald

摘要:

最近,在大量的星系团和仙女座星系团的组合光谱中发现了3.55 keV发射线的迹象。这条谱线不能用任何已知的谱线来识别。人们很容易推测,它的起源是一种粒子的衰变,这种粒子贡献了全部或部分暗物质。在本文中,我们想指出的是,作为全部或部分暗物质的类轴子粒子是产生这种特征的理想候选者。更重要的是,在基于弦论的标准模型的扩展中,所需的参数值是相当可行的,并且可以与各种其他有趣的现象联系起来,这也可能允许对这种推测进行新的检验。

英文摘要:

Recently, indications for an emission line at 3.55 keV have been found in the combined spectra of a large number of galaxy clusters and also in Andromeda. This line could not be identified with any known spectral line. It is tempting to speculate that it has its origin in the decay of a particle contributing all or part of the dark matter. In this note we want to point out that axion-like particles being all or part of the dark matter are an ideal candidate to produce such a feature. More importantly the parameter values necessary are quite feasible in extensions of the Standard Model based on string theory and could be linked up to a variety of other intriguing phenomena, which also potentially allow for new tests of this speculation.

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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