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arXiv 0811.4429hep-ph
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多组分暗物质

Multi-Component Dark Matter

Kathryn M. Zurek

摘要:

我们探索多组分暗物质模型,其中暗扇区由具有不同质量尺度的多个稳定状态组成,并且将这些状态耦合的暗力进一步丰富了动力学。暗物质的多组分性质自然出现在超对称模型中,其中R宇称和额外的对称性,如$Z_2$,都被保留。我们专注于一个特定的模型,其中较重的组成部分的暗物质携带轻子数和湮灭主要轻子。较重的成分,本质上是一种无菌中微子,自然解释了PAMELA,ATIC和同步加速器信号,没有过量的反质子,这通常会破坏其他弱尺度暗物质的模型。质量从GeV到TeV的较轻的成分可能解释了DAMA信号,并且可能在CDMS和XENON的低阈值运行中可见,它们搜索轻的暗物质。

英文摘要:

We explore multi-component dark matter models where the dark sector consists of multiple stable states with different mass scales, and dark forces coupling these states further enrich the dynamics. The multi-component nature of the dark matter naturally arises in supersymmetric models, where both R parity and an additional symmetry, such as a $Z_2$, is preserved. We focus on a particular model where the heavier component of dark matter carries lepton number and annihilates mostly to leptons. The heavier component, which is essentially a sterile neutrino, naturally explains the PAMELA, ATIC and synchrotron signals, without an excess in antiprotons which typically mars other models of weak scale dark matter. The lighter component, which may have a mass from a GeV to a TeV, may explain the DAMA signal, and may be visible in low threshold runs of CDMS and XENON, which search for light dark matter.

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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