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arXiv 1003.1912hep-ph
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与物质相互作用依赖自旋的暗物质的分类

A Classification of Dark Matter Candidates with Primarily Spin-Dependent Interactions with Matter

Prateek Agrawal, Zackaria Chacko, Can Kilic, Rashmish K. Mishra

摘要:

我们对弱相互作用大质量粒子(WIMP)候选暗物质进行了模型独立的分类,这些暗物质具有核子散射由自旋相关相互作用主导的特性。我们研究可重整化的理论,其中散射的暗物质是弹性的,并在树的水平。我们表明,如果WIMP-核子截面是由自旋相关的相互作用占主导地位的自然暗物质的候选人是马约拉纳费米子或真正的矢量玻色子,使暗物质粒子是自己的反粒子。在这种情况下,标量暗物质是不受欢迎的。狄拉克费米子和复矢量玻色子暗物质也不受欢迎,除了非常具体的量子数选择。我们进一步确定,任何这样的理论必须包含新的粒子接近弱标度与标准模型量子数,或者,一个$Z'$规范玻色子的质量等于或低于TeV的规模。在当前直接探测实验感兴趣的参数空间区域中,这些粒子自然位于大型强子对撞机(LHC)运动学上可访问的质量范围内。

英文摘要:

We perform a model-independent classification of Weakly Interacting Massive Particle (WIMP) dark matter candidates that have the property that their scattering off nucleons is dominated by spin-dependent interactions. We study renormalizable theories where the scattering of dark matter is elastic and arises at tree-level. We show that if the WIMP-nucleon cross section is dominated by spin-dependent interactions the natural dark matter candidates are either Majorana fermions or real vector bosons, so that the dark matter particle is its own anti-particle. In such a scenario, scalar dark matter is disfavored. Dirac fermion and complex vector boson dark matter are also disfavored, except for very specific choices of quantum numbers. We further establish that any such theory must contain either new particles close to the weak scale with Standard Model quantum numbers, or alternatively, a $Z'$ gauge boson with mass at or below the TeV scale. In the region of parameter space that is of interest to current direct detection experiments, these particles naturally lie in a mass range that is kinematically accessible to the Large Hadron Collider (LHC).

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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