The SABRE project and the SABRE Proof-of-Principle
The SABRE project and the SABRE Proof-of-Principle
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DOI：
10.1140/epjc/s10052-019-6860-y
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发表时间：
2019-04-26
影响因子：
4.4
通讯作者：
Xu, J.
中科院分区：
文献类型：
--
作者：
Antonello, M.;Barberio, E.;Xu, J.
SABRE旨在直接测量暗物质与NaI（Tl）晶体相互作用速率的年度调制。一个调制兼容的标准假设，其中我们的银河系是沉浸在暗物质晕，已被测量的DAMA实验在相同的目标材料。其他直接探测实验，使用不同的目标材料，似乎排除了这种调制的解释，在最简单的情况下，WIMP核子弹性散射。SABRE实验的目的是进行一次独立的搜索，具有足够的灵敏度来证实或反驳DAMA的说法。SABRE实验的目标是实现NaI（Tl）实验的最低背景速率（在暗物质感兴趣的能量区域中为0.1 cpd/kg/keV（ee））。这个具有挑战性的目标可以通过在液体闪烁体中操作高纯度晶体来实现，以用于主动背景抑制。此外，将在北方和南方半球安装双探测器，以查明季节性或与场地有关的影响对调制的可能影响。SABRE项目包括LNGS（意大利）的初始原理验证阶段，以评估晶体的放射性纯度和液体闪烁体否决的效率。本文介绍了SABRE的一般概念和对WIMP年调制的预期敏感性。
SABRE aims to directly measure the annual modulation of the dark matter interaction rate with NaI(Tl) crystals. A modulation compatible with the standard hypothesis, in which our Galaxy is immersed in a dark matter halo, has been measured by the DAMA experiment in the same target material. Other direct detection experiments, using different target materials, seem to exclude the interpretation of such modulation in the simplest scenario of WIMP-nucleon elastic scattering. The SABRE experiment aims to carry out an independent search with sufficient sensitivity to confirm or refute the DAMA claim. The goal of the SABRE experiment is to achieve the lowest background rate for a NaI(Tl) experiment (order of 0.1 cpd/kg/keV(ee) in the energy region of interest for dark matter). This challenging goal could be achievable by operating high-purity crystals inside a liquid scintillator veto for active background rejection. In addition, twin detectors will be located in the northern and southern hemispheres to identify possible contributions to the modulation from seasonal or site-related effects. The SABRE project includes an initial Proof-of-Principle phase at LNGS (Italy), to assess the radio-purity of the crystals and the efficiency of the liquid scintillator veto. This paper describes the general concept of SABRE and the expected sensitivity to WIMP annual modulation.