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arXiv 0909.2900hep-ph
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共振暗物质

Resonant Dark Matter

Yang Bai, Patrick J. Fox

摘要:

通常假设暗物质直接探测对大部分的暗物质(DM)速度分布敏感。我们提出了另一种形式的暗物质-核散射,它只探测一个狭窄的范围内的DM速度由于存在的共振,DM-核束缚态,在散射共振暗物质(rDM)。散射截面变得高度依赖于元件,具有增加的调制,并且因此可以解释DAMA/LIBRA结果,同时与其他直接检测实验不冲突。我们描述了一个简单的模型,实现了动态的rDM,DM是一个费米子弱三重态的带电伙伴的质量相差约10兆电子伏的中性组件。

英文摘要:

It is usually assumed that dark matter direct detection is sensitive to a large fraction of the dark matter (DM) velocity distribution. We propose an alternative form of dark matter-nucleus scattering which only probes a narrow range of DM velocities due to the existence of a resonance, a DM-nucleus bound state, in the scattering - resonant dark matter (rDM). The scattering cross section becomes highly element dependent, has increased modulation and as a result can explain the DAMA/LIBRA results whilst not being in conflict with other direct detection experiments. We describe a simple model that realizes the dynamics of rDM, where the DM is the neutral component of a fermionic weak triplet whose charged partners differ in mass by approximately 10 MeV.

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