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暗物质是什么?科学家已经将轴子排除在外!

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什么是暗物质?科学家排除了轴!

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科学家预测暗物质,无形和无形,约占宇宙质量的85%。不幸的是,它与传统材料的相互作用非常微弱,物理学家们正在寻找数十年。一种被称为Axions的可疑暗物质粒子是长期候选者之一。然而,最近科学家们通过最新的研究排除了这种可能性。

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在最近的一项实验中,科学家发现这种假想的粒子(至少在一定质量范围内)不存在。 (通过:新地图集)

物理学家已经提出了许多关于暗物质可能组成的理论。然而,发现暗物质的不同实验集中于特定类型的粒子。虽然没有找到确切的内容,但它至少有助于缩小未来研究的方向和范围。

以前,HADES粒子探测器已经排除了“暗光子”,而LUX和XENON1T也排除了某些类型的“弱相互作用”大质量粒子(WIMP)。

本文介绍的最新研究围绕着一个不同的嫌疑人,即Axions。假设这种中性中性粒子普遍存在并且不与周围的漂浮常规物质相互作用。

根据理论,轴可能与电和磁相互作用,因此研究人员决定通过专门设计的实验对其进行测试。

首席研究员Lindley Winslow说:“暗物质不会影响人们的日常生活,但他们被认为是宇宙的膨胀和我们在夜空中观察到的星系的形成。”

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Cross-sectional profile of the new axon detector (from: MIT)

A few years ago, researchers at the Massachusetts Institute of Technology proposed a theoretical experiment that could theoretically be used to detect axes. Simply put:

It is known from the nature of the electromagnetic field that there should be no magnetic field at the center of the ring magnet. But if there are axes that are smashing around, they may create a weak signal in the 'deadzone'.

Winslow said that the idea of this experiment is very attractive. If you can find the signal of the suspected axis, it is almost impossible for other reasons.

Using the amplified B-field ring device, the research team named the experiment a 'wideband/resonance method for cosmic azimuth detection' (abbreviated ABRACADABRA).

Basically, the device is a small circular magnet that is held in a chamber that cools to near absolute zero. It has now completed the construction of this system and published the latest experimental results.

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To counteract the vibration disturbances from the cooling system, the cabin is suspended on a thin wire, and the laboratory shields external heat, noise and electromagnetic interference.

During the first month of the experiment, the team did not detect any signs of azimuth between 0.31 and 8.3 nanoelectron volts.

In view of this, the research team has come to two possible conclusions. Either the axis is larger or smaller than these two ranges, or their effects on electromagnetics are smaller than previously thought.

However, the test accuracy of this test has been quite small, only one billion. Of course, the ineffective results of this study did not refute the theory of dark matter.

xx目前,物理学家仍然有很多“候选粒子”。每个实验交叉进一步缩小了筛选的方向和范围,使我们更接近最终答案。

据报道,其他实验如nEDM一直在寻找其他类型的候选粒子。在未来的实验中,我们仍然希望在一定的质量范围内引入结果。

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