FASER $ν$揭开黑暗扇区的神秘面纱
Unravelling the richness of dark sector by FASER$ν$
摘要：
FASER $ν$是一个新提出的实验，将在2021-2023年期间在LHC的运行III中获取数据。它将位于FASER探测器的前方，在前向方向上距离ATLAS相互作用点480米。它的主要目标是检测在相互作用点产生的所有口味的中微子，并以极高的精度重建带电轨道。这种能力使FASER $ν$成为发现亮暗扇区的图案和属性的理想设置。我们证明了这种能力的一个动机良好的一类模型与暗物质候选人的质量约为几个GeV。暗物质湮灭为一对中间中性粒子，随后衰变为标准模型带电费米子。我们展示了如何FASER $ν$可以揭示暗区的结构解开这种模型内的衰变链。
英文摘要：
FASER$ν$ is a newly proposed experiment which will take data in run III of the LHC during 2021-2023. It will be located in front of the FASER detector, 480~m away from the ATLAS interaction point in the forward direction. Its main goal is to detect neutrinos of all flavors produced at the interaction point with superb precision in reconstructing charged tracks. This capability makes FASER$ν$ an ideal setup for uncovering the pattern and properties of a light dark sector. We demonstrate this capability for a well-motivated class of models with a dark matter candidate of mass around a few GeV. Dark matter annihilates to a pair of intermediate neutral particles that subsequently decay into the standard model charged fermions. We show how FASER$ν$ can shed light on the structure of the dark sector by unravelling the decay chain within such models.
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