arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2107.11244astro-ph.HE
收藏

用8年的IceCube数据寻找来自地球中心的暗物质

Search for dark matter from the center of the Earth with 8 years of IceCube data

Giovanni Renzi

摘要:

暗物质(DM)的性质仍然是基础物理学中最重要的未解决的问题之一。许多模型,包括弱相互作用大质量粒子(WIMPs),假设DM是一个粒子,并预测与标准模型物质的弱耦合。如果DM粒子可以在大质量物体(如恒星或行星)附近从原子核散射,它们可能会失去动能,并被引力困在这些物体(包括地球)的中心。当DM在地球中心积累时,WIMP自湮灭成标准模型粒子会导致中微子过量,位于南极的冰立方中微子天文台可以检测到。从这些湮灭多余的中微子的搜索已经进行了使用8年的冰立方数据,结果已被解释的上下文中的一些WIMP湮灭通道($χχ\rightarrowτ^+τ^-$ / $W^+W^-$ / $b\bar{b}$)和质量范围从10 GeV到10 TeV。我们提出了这项分析的最新结果,并将结果与IceCube和其他实验的先前分析进行了比较,显示出具有竞争力的结果,在参数空间的某些部分甚至是世界领先的。

英文摘要:

The nature of Dark Matter (DM) remains one of the most important unresolved questions of fundamental physics. Many models, including Weakly Interacting Massive Particles (WIMPs), assume DM to be a particle and predict a weak coupling with Standard Model matter. If DM particles can scatter off nuclei in the vicinity of a massive object such as a star or a planet, they may lose kinetic energy and become gravitationally trapped in the center of such objects, including Earth. As DM accumulates in the center of the Earth, self-annihilation of WIMPs into Standard Model particles can result in an excess of neutrinos which are detectable at the IceCube Neutrino Observatory, situated at the geographic South Pole. A search for excess neutrinos from these annihilations has been performed using 8 years of IceCube data, and results have been interpreted in the context of a number of WIMP annihilation channels ($χχ\rightarrowτ^+τ^-$/$W^+W^-$/$b\bar{b}$) and masses ranging from 10 GeV to 10 TeV. We present the latest results from this analysis and compare the outcome with previous analyses by IceCube and other experiments, showing competitive results, which are even world-leading in some parts of the parameter space.

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。

↑