LZ 是否看到了修正引力？
Did LZ see modified gravity?
- Department of Physics, School of Engineering and Sciences, SRM University-AP（SRM大学阿帕分校工程与科学学院物理系）
机构由 AI 辅助整理，请以论文原文为准。
AI总结：
本文探讨LZ实验高能核反冲事件能否由非标准宇宙学历史中的冻结入暗物质解释，并确定满足约束的可行参数区，展示直接探测实验对非标准宇宙学及替代引力理论的探测潜力。
AI中文摘要：
我们研究了 LUX-ZEPLIN（LZ）合作组最近报道的高能核反冲事件是否可以被解释为非标准宇宙学历史中冻结入暗物质（DM）的信号。我们考虑了在大爆炸核合成之前的修正膨胀时期，暗物质从标准模型热浴中产生的过程。要求与观测到的暗物质丰度、宇宙学及对撞机约束保持一致，我们确定了能够容纳 LZ 事件的可行参数区域。我们的结果展示了直接探测实验在探测非标准宇宙学历史以及更广泛的替代引力理论方面的潜力。
英文摘要：
We investigate whether the recently reported high-energy nuclear recoil event by the LUX-ZEPLIN (LZ) collaboration can be interpreted as a signal of freeze-in dark matter (DM) in a non-standard cosmological history. We consider DM production from the Standard Model thermal bath during an era of modified expansion preceding Big Bang nucleosynthesis. Requiring consistency with the observed DM abundance, cosmological and collider constraints, we identify viable parameter regions that can accommodate the LZ event. Our results demonstrate the potential of direct detection experiments to probe non-standard cosmological histories and, more broadly, alternative theories of gravity.
