发表机构
Srinakharinwirot University; National Research and Innovation Agency; Parahyangan Catholic University（斯里纳卡林威洛大学; 国家研究与创新署; 帕拉扬天主教大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
该研究提出暗物质诱导中子消失机制，解释LZ实验248 keV核反冲事件，确定5和50 GeV质量参数区域，并利用对撞机及Borexino数据约束，为未来直接探测实验提供解释框架。
AI 中文摘要
我们研究暗物质诱导的中子消失，作为对LUX-ZEPLIN报告的高能核反冲事件的一种解释。一个入射的暗物质粒子将一个束缚中子湮灭为不可见标量，留下反冲的子核。对于每个可到达的子核态，两体运动学在零速度极限下固定反冲能量，产生由晕速度展宽的线谱。我们确定了基准暗物质质量为5和50 GeV的参数区域，这些区域可以解释接近248 keV的事件，而不产生较低能量的事件。我们在一个示例性紫外完备化中检查对撞机约束，并重新分析Borexino数据以约束伴随的核退激信号。更一般地，暗物质诱导的中子消失为解释未来直接探测实验中的局部核反冲过剩提供了一个框架。
英文摘要
We investigate dark-matter-induced neutron disappearance as an interpretation of the high-energy nuclear recoil event reported by LUX-ZEPLIN. An incoming dark matter (DM) particle annihilates a bound neutron into an invisible scalar, leaving a recoiling daughter nucleus. For each accessible daughter state, two-body kinematics fixes the recoil energy in the zero-velocity limit, producing a line spectrum broadened by halo velocities. We identify parameter regions for benchmark DM masses of 5 and 50 GeV that can account for the event near 248 keV without producing events at lower energy. We examine collider constraints in an illustrative ultraviolet completion and recast Borexino data to constrain accompanying nuclear de-excitation signals. More generally, the DM-induced neutron disappearance provides a framework for interpreting localized nuclear recoil excesses in future direct-detection experiments.
Comments5 pages, 2 figures, 1 table, comments are welcome
