发表机构
The ICFAI University Tripura（印度特里普拉ICFAI大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文提出，LZ实验观测到的248 keV核反冲事件可能由标量门户暗物质模型中的非弹性暗物质和味特定夸克新物理共同解释，其中夸克汤川耦合偏离SM值，新物理尺度不高于约10 TeV，未来对撞机可检验该假设。
AI 中文摘要
LUX-ZEPLIN（LZ）合作组最近报告观测到一次能量为$248\pm 23 (stat)\pm 23 (sys)$ keV的孤立核反冲事件，这可能是超越标准模型（BSM）可能性（尤其是暗物质（DM））的一个有趣信号。本文探讨了一种情景，其中观测到的反冲可能同时指示非弹性暗物质和夸克扇区中味特定的新物理（NP）相互作用。考虑标准模型（SM）的一个最小扩展，包含两个近简并的$Z_2$-奇矢量样费米子（VLFs），通过标量门户与SM相互作用，分析表明，如果允许夸克汤川耦合偏离其SM值，则可以完美解释观测到的248 keV核反冲。底层的亲夸克NP可能源于NP尺度$\Lambda\leq \mathcal{O}(10)$ TeV处的维度-6有效算符。未来的对撞机搜索对于检验/证伪该提议至关重要。
英文摘要
The recent observation of an isolated nuclear recoil event at an energy of $248\pm 23 (stat)\pm 23 (sys)$ keV, as reported by the LUX-ZEPLIN (LZ) collaboration, can be an intriguing signature for Beyond the Standard Model (BSM) possibilities, particularly for dark matter (DM). This paper explores a scenario in which the observed recoil could simultaneously signal inelastic DM and a flavor-specific New Physics (NP) interaction in the quark sector. Considering a minimal extension of the Standard Model (SM) with two closely degenerate $Z_2$-odd vector-like fermions (VLFs), interacting with the SM via a scalar portal, the analysis shows that a perfect agreement with the observed 248 keV nuclear recoil can be achieved if the quark Yukawa couplings are allowed to deviate from their SM values. The underlying quarkophilic NP can originate from a dimension-6 effective operator at a NP scale $Λ\leq \mathcal{O}(10)$ TeV. Future collider searches can be crucial to test/falsify the proposal.
Comments8 pages, 2 figures, 1 table
