暗衍射在LZ实验中的屏蔽中性复合重子
Dark Diffraction at LZ from a Screened Neutral Composite Baryon
浏览论文内容
中文总结 AI 辅助
本文提出复合暗物质弹性形状因子可解释LZ实验的高能核反冲候选事件，无需非弹性劈裂，四暗夸克模型在200 GeV基准下预测约1.5个额外真实反冲。
中文摘要 AI 辅助
LUX-ZEPLIN（LZ）实验最近报告了一个类似核反冲的候选事件，其能量为$E_R=248\pm23_{\rm stat}\pm23_{\rm sys}$ keV。我们表明，这种高能反冲可以源于复合暗物质的弹性形状因子，而无需引入非弹性质量劈裂或增强的粒子群。由$N$个暗夸克组成的中性重子可以具有在低动量转移时被抑制但在较高动量转移时恢复的电荷形状因子，从而提供动量空间带通滤波器。使用每个带电组分种类一个高斯的形状因子建模，我们证明两个项无法产生硬反冲谱，并发现三个项在LZ信号窗口中产生的事件太少，而四个项则足够。一个禁闭的$SU(4)_D\times U(1)_D$规范理论通过由四个暗夸克组成的中性玻色子重子提供了具体实现。对于归一化为一个接受事件的200 GeV基准，我们预测在当前LZ感兴趣区域之外约有1.5个真实反冲。该形状因子还在固定动量转移处产生衍射节点，将其置于随靶核质量$1/m_A$标度的反冲能量处。
英文摘要
The LUX-ZEPLIN (LZ) experiment recently reported a nuclear-recoil-like candidate at $E_R=248\pm23_{\rm stat}\pm23_{\rm sys}$ keV. We show that such an energetic recoil can arise from the elastic form factor of composite dark matter, without invoking an inelastic mass splitting or a boosted population. A neutral baryon of $N$ dark quarks can have a charge form factor that is suppressed at low momentum transfer but recovers at higher momentum transfer, providing a momentum-space band-pass filter. Modeling the form factor with one Gaussian per charged constituent species, we prove that two terms cannot produce a hard recoil spectrum and find that three yield too few events in the LZ signal window, while four suffice. A confining $SU(4)_D\times U(1)_D$ gauge theory provides a concrete realization through a neutral bosonic baryon made of four dark quarks. For a 200 GeV benchmark normalized to one accepted event, we predict approximately 1.5 true recoils beyond the current LZ region of interest. The form factor also produces diffraction nodes at fixed momentum transfers, placing them at recoil energies that scale as $1/m_A$ across target nuclei.
发表机构
- Yonsei University（延世大学）
- Korea Institute for Advanced Study（韩国高等研究院）
机构由 AI 辅助整理，请以论文原文为准。
