Strange mechanics of the neutrino flavor pendulum
Strange mechanics of the neutrino flavor pendulum
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DOI：
10.1103/physrevd.97.023020
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发表时间：
2017-09
影响因子：
5
通讯作者：
Lucas Johns;G. Fuller
中科院分区：
文献类型：
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作者：
Lucas Johns;G. Fuller
我们确定在味转换的天体物理中微子的一类新的现象，其中一个共同的结果是抑制味转换。诉诸双极中微子系统和陀螺摆之间的等效性，我们发现这些现象在机械图像中有相当惊人的解释：在一个例子中，陀螺摆最初在一个方向上进动，然后停下来，开始在相反的方向上进动-一种违反直觉的行为，我们类比为一个玩具的运动称为响尾蛇。我们分析了早期宇宙中的这些行为，其中出现了与无菌中微子暗物质的偶然联系，我们简要地提出了它们如何在致密物体环境中表现出来。
We identify in the flavor transformation of astrophysical neutrinos a new class of phenomena, a common outcome of which is the suppression of flavor conversion. Appealing to the equivalence between a bipolar neutrino system and a gyroscopic pendulum, we find that these phenomena have rather striking interpretations in the mechanical picture: in one instance, the gyroscopic pendulum initially precesses in one direction, then comes to a halt and begins to precess in the opposite direction---a counterintuitive behavior that we analogize to the motion of a toy known as a rattleback. We analyze these behaviors in the early universe, wherein a chance connection to sterile neutrino dark matter emerges, and we briefly suggest how they might manifest in compact-object environments.