用2350 Kg引力波铝棒探测器寻找夸克块
Quark nuggets search using 2350 Kg gravitational waves aluminum bar detectors
摘要：
引力波共振探测器可以用作夸克块的探测器，比如核微粒（含有奇异夸克的核物质）。这项研究是使用两个2350公斤，2 K冷却，铝棒探测器的数据进行的：NAUTILUS，位于弗拉斯卡蒂（意大利），和EXPLORER，位于CERN日内瓦（CH）。这两个天线都配备了宇宙射线簇射探测器：由于簇射在酒吧中的信号不断检测和用于表征天线的性能。杆激励机制是基于所谓的热声效应，研究专用实验，使用粒子束。该机制预测，杆的振动是由颗粒沉积在杆中的热量引起的。条形探测器的几何可接受度为19.5 $\rm m^2$ sr，小于用于类似搜索的其他探测器。然而，检测机制是完全不同的，比其他检测器更直接。我们将展示NAUTILUS（2003-2012）10年数据和EXPLORER（2003-2009）7年数据的结果。我们得到的实验限制是感兴趣的，因为，对于质量小于$10^{-4}$克的核质，我们发现一个通量小于一个预测考虑核质作为暗物质候选人。
英文摘要：
The gravitational wave resonant detectors can be used as detectors of quark nuggets, like nuclearites (nuclear matter with a strange quark). This search has been carried out using data from two 2350 Kg, 2 K cooled, aluminum bar detectors: NAUTILUS, located in Frascati (Italy), and EXPLORER, that was located in CERN Geneva (CH). Both antennas are equipped with cosmic ray shower detectors: signals in the bar due to showers are continuously detected and used to characterize the antenna performances. The bar excitation mechanism is based on the so called thermo-acoustic effect, studied on dedicated experiments that use particle beams. This mechanism predicts that vibrations of bars are induced by the heat deposited in the bar from the particle. The geometrical acceptance of the bar detectors is 19.5 $\rm m^2$ sr, that is smaller than that of other detectors used for similar searches. However, the detection mechanism is completely different and is more straightforward than in other detectors. We will show the results of ten years of data from NAUTILUS (2003-2012) and 7 years from EXPLORER (2003-2009). The experimental limits we obtain are of interest because, for nuclearites of mass less than $10^{-4}$ grams, we find a flux smaller than that one predicted considering nuclearites as dark matter candidates.
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