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arXiv 1404.7484hep-phastro-ph.CO
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直接探测光“嫌热”放热暗物质

Direct Detection of Light "Ge-phobic" Exothermic Dark Matter

Graciela B. Gelmini, Andreea Georgescu, Ji-Haeng Huh

摘要:

我们提出的直接暗物质(DM)的检测数据的轻WIMP与放热散射与核(exoDM)的比较,无论是假设标准晕模型(SHM)和晕模型无关的方式。放热相互作用有利于轻目标,从而降低了来自氙目标的上限的重要性,其中最具限制性的是目前的LUX限制。在我们的SHM分析中,CDMS-II-Si和CoGeNT区域被这些边界所允许,然而最近的SuperCDMS限制拒绝了具有同位旋守恒耦合的exoDM的两个区域。exoDM的违反同位旋的耦合,特别是具有$-0.8$的中子与质子耦合比的耦合(我们称之为“Ge-phobic”),最大限度地减少了DM与锗的耦合,并允许CDMS-II-Si区域变得与所有边界兼容。这也清楚地显示在我们的光环独立分析。

英文摘要:

We present comparisons of direct dark matter (DM) detection data for light WIMPs with exothermic scattering with nuclei (exoDM), both assuming the Standard Halo Model (SHM) and in a halo model - independent manner. Exothermic interactions favor light targets, thus reducing the importance of upper limits derived from xenon targets, the most restrictive of which is at present the LUX limit. In our SHM analysis the CDMS-II-Si and CoGeNT regions become allowed by these bounds, however the recent SuperCDMS limit rejects both regions for exoDM with isospin-conserving couplings. An isospin-violating coupling of the exoDM, in particular one with a neutron to proton coupling ratio of $-0.8$ (which we call "Ge-phobic"), maximally reduces the DM coupling to germanium and allows the CDMS-II-Si region to become compatible with all bounds. This is also clearly shown in our halo-independent analysis.

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