AI 中文总结
本文结合COHERENT Ge-mini与TEXONO的锗基CEνNS数据，对SM及新物理开展分析，获得弱混合角低能测定结果，推导中微子电磁性质等新约束，为精确电弱检验及新物理探测提供低能实验室。
AI 中文摘要
本文针对COHERENT Ge-mini与TEXONO实验的最新锗基相干弹性中微子核散射（CEνNS）数据开展了全面数值分析，以检验标准模型（SM）并寻找新物理。通过结合CEνNS与弹性中微子核散射（EνNS）信号，并一致处理探测器效应与系统不确定性，我们从COHERENT Ge-mini实验获得了弱混合角的低能测定结果，该结果与SM预测一致。我们对中微子电磁性质（包括磁矩、毫电荷、电荷半径及轴向电偶极矩）推导了新约束，其中TEXONO实验提供的约束尤其具有竞争力。纳入EνNS信号后，对中微子毫电荷的灵敏度显著提升，幅度可达三个数量级。我们还研究了轻标量与矢量媒介子，发现反应堆源与停止π介子源在不同媒介子质量区间具有显著互补性。最后，我们对通过过渡偶极、标量及矢量门户产生的惰性中性轻子施加了约束，探测质量范围从亚MeV到数十MeV尺度。我们的结果表明，当前锗基CEνNS实验为精确电弱检验及广泛超出SM的物理提供了强大的低能实验室与互补探测手段。
英文摘要
A comprehensive numerical analysis of the latest germanium based CE$ν$NS data from the COHERENT Ge-mini and TEXONO experiments has been conducted to test the Standard Model (SM) and search for new physics. By combining CE$ν$NS and E$ν$NS signals with a consistent treatment of detector effects and systematic uncertainties, we obtain a low energy determination of the weak mixing angle from COHERENT Ge-mini, in agreement with the SM prediction. We derive novel constraints on neutrino electromagnetic properties, including the magnetic moment, millicharge, charge radius, and anapole moment, with TEXONO providing particularly competitive bounds. Inclusion of E$ν$NS, significantly improves the sensitivity to the neutrino millicharge by up to three orders of magnitude. We also investigated light scalar and vector mediators, finding striking complementarity between reactor and stopped pion sources across different mediator mass regimes. Finally, we put bounds on sterile neutral leptons production through transition dipole, scalar, and vector portals, probing masses from the sub MeV to tens of MeV scale. Our results demonstrate that current germanium based CE$ν$NS experiments provide a powerful low energy laboratory for precision electroweak tests and complementary probes of a broad class of physics beyond the SM.
Comments33 pages, 12 figures, 3 tables
