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Light Dark Matter eXperiment（轻暗物质实验）的当前状态与未来展望

Current Status and Future Prospects for the Light Dark Matter eXperiment

Torsten Åkesson, Nikita Blinov, Lukas Brand-Baugher, Cameron Bravo, Lene Kristian Bryngemark, Pierfrancesco Butti, Caterina Doglioni, Craig Dukes, Valentina Dut… 展开作者

Torsten Åkesson, Nikita Blinov, Lukas Brand-Baugher, Cameron Bravo, Lene Kristian Bryngemark, Pierfrancesco Butti, Caterina Doglioni, Craig Dukes, Valentina Dutta, Bertrand Echenard, Ralf Ehrlich, Thomas Eichlersmith, Andrew Furmanski, Chloe Greenstein, Craig Group, Niramay Gogate, Vinay Hegde, Christian Herwig, David G. Hitlin, Duc Hoang, Tyler Horoho, Joseph Incandela, Wesley Ketchum, Gordan Krnjaic, Amina Li, Shirley Li, Dexu Lin, Jeremiah Mans, Cristina Mantilla Suarez, Phillip Masterson, Martin Meier, Sophie Middleton, Omar Moreno, Geoffrey Mullier, Timothy Nelson, James Oyang, Jessica Pascadlo, Ruth Pöttgen, Stefan Prestel, Luis Sarmiento Pico, Philip Schuster, Matthew Solt, Lauren Tompkins, Natalia Toro, Nhan Tran, Andrew Whitbeck, Kevin Zhou, Laura Zichi

备注：
26 pages, 17 figures. Contribution to Snowmass 2021
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AI总结：

本文介绍了轻暗物质实验LDMX的理论动机、实验挑战与应对方案，指出其通过电子束固定靶缺失动量法探测亚GeV轻暗物质，还可探索多种新物理与标准物理过程，并为DUNE的中微子散射建模提供数据支持。

摘要：

暗物质的构成至今仍未明确，其可能的候选粒子质量范围跨度极大。物理学界已将寻找亚GeV（吉电子伏特）暗物质列为高度优先事项，并确定基于加速器的实验是该搜寻策略的核心组成部分。基于加速器的暗物质研究计划的一个关键目标，是通过设计用于直接产生暗物质粒子的实验，验证热产生亚GeV暗物质这一广泛猜想。寻找轻暗物质产生的最灵敏方法，是利用初级电子束在固定靶碰撞中产生暗物质。Light Dark Matter eXperiment（LDMX，轻暗物质实验）是一项电子束固定靶缺失动量实验，它实现了这一方法，对亚GeV范围内的轻暗物质具有独特的探测灵敏度。本文概述了相关理论动机、主要实验挑战、LDMX应对这些挑战的方式，以及预计的探测灵敏度。我们进一步阐述了LDMX在探索其他值得关注的新物理与标准物理方面的能力，例如可见衰变轴子、矢量介子 mediator（媒介子）或稀有介子衰变，以及其提供及时电子-核散射测量的能力，这些测量将为DUNE（深地下中微子实验）的中微子-核散射建模提供参考。

英文摘要：

The constituents of dark matter are still unknown, and the viable possibilities span a vast range of masses. The physics community has established searching for sub-GeV dark matter as a high priority and identified accelerator-based experiments as an essential facet of this search strategy. A key goal of the accelerator-based dark matter program is testing the broad idea of thermally produced sub-GeV dark matter through experiments designed to directly produce dark matter particles. The most sensitive way to search for the production of light dark matter is to use a primary electron beam to produce it in fixed-target collisions. The Light Dark Matter eXperiment (LDMX) is an electron-beam fixed-target missing-momentum experiment that realizes this approach and provides unique sensitivity to light dark matter in the sub-GeV range. This contribution provides an overview of the theoretical motivation, the main experimental challenges, how LDMX addresses these challenges, and projected sensitivities. We further describe the capabilities of LDMX to explore other interesting new and standard physics, such as visibly-decaying axion and vector mediators or rare meson decays, and to provide timely electronuclear scattering measurements that will inform the modeling of neutrino-nucleus scattering for DUNE.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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