Direct detection of light dark matter and solar neutrinos via color center production in crystals
Direct detection of light dark matter and solar neutrinos via color center production in crystals
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DOI：
10.1016/j.physletb.2018.04.063
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发表时间：
2017-05
影响因子：
4.4
通讯作者：
R. Budnik;O. Chesnovsky;O. Slone;T. Volansky
中科院分区：
文献类型：
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作者：
R. Budnik;O. Chesnovsky;O. Slone;T. Volansky
我们提出了一种新的低阈值直接探测概念，用于暗物质和太阳中微子的相干核散射，基于原子的解离和随后在晶格内产生色心型缺陷。我们方法的新颖之处在于它能够检测宏观材料中的单个缺陷。此类实验具有超低能量阈值，允许通过核散射探测轻至 O (10) MeV 的暗物质。晶体中缺陷产生的另一个特征是方向信息，它表现为壮观的信号和以相互作用速率的日常调制形式减少背景的手柄。我们讨论设想的设置和检测技术，以及背景减少。我们进一步计算了两个存在可用数据的示例晶体中暗物质和太阳中微子的预期速率，证明了此类实验的预期敏感性。
We propose a new low-threshold direct-detection concept for dark matter and for coherent nuclear scattering of solar neutrinos, based on the dissociation of atoms and subsequent creation of color center type defects within a lattice. The novelty in our approach lies in its ability to detect single defects in a macroscopic bulk of material. This class of experiments features ultra-low energy thresholds which allows for the probing of dark matter as light as O (10) MeV through nuclear scattering. Another feature of defect creation in crystals is directional information, which presents as a spectacular signal and a handle on background reduction in the form of daily modulation of the interaction rate. We discuss the envisioned setup and detection technique, as well as background reduction. We further calculate the expected rates for dark matter and solar neutrinos in two example crystals for which available data exists, demonstrating the prospective sensitivity of such experiments.