发表机构
School of Physics, University of Hyderabad（海德拉巴大学物理学院）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文首次同时分析DUNE和MOMENT实验中惰性中微子与NSI效应，发现联合可恢复CP破坏灵敏度并约束参数，强调多基线策略的必要性。
AI 中文摘要
在这项工作中，我们首次提出了在未来长基线和中间基线实验DUNE和MOMENT中，对3+1框架下的非标准中微子相互作用（NSI）和轻惰性中微子进行同时分析。我们表明，分别处理这两个领域会产生过于乐观的灵敏度。惰性中微子混合和复杂NSI的同时存在，使$|\varepsilon_{e\mu}|$的灵敏度减弱了约（2-3）倍，主要退化与味道改变NSI领域中额外参数自由度相关。一旦NSI相位被边缘化，仅DUNE无法实现$5\sigma$的CP破坏发现。DUNE+MOMENT组合在广泛的$\delta_{\rm CP}$空间上恢复了$>5\sigma$的灵敏度，在95%置信水平下约束$\sin^2\theta_{24}\lesssim10^{-2}$和$|\varepsilon_{e\mu}|\lesssim0.025$，并解决了单独任一实验难以处理的简并问题。我们的结果表明，结合富物质和近真空基线的多基线策略，对于在两种新物理场景同时存在时进行稳健的参数提取是必要的。同时进行新物理分析对于可靠地解释未来的精密中微子振荡数据也很重要。
英文摘要
In this work, we present for the first time, the simultaneous analysis of the non-standard neutrino interactions (NSI) and a light sterile neutrino in the 3+1 framework for the future long- and medium-baseline experiments DUNE and MOMENT, respectively. We show that treating the two sectors separately yields over optimistic sensitivities. The simultaneous presence of sterile-neutrino mixing and complex NSI weakens the $|\varepsilon_{eμ}|$ sensitivity by a factor of $\sim (2-3)$ with the dominant degradation associated with the additional parameter freedom in the flavor-changing NSI sector. DUNE alone fails to achieve $5σ$ CP-violation discovery, once NSI phases are marginalized over. The DUNE+MOMENT combination recovers $>5σ$ sensitivity over a wide range of $δ_{\rm CP}$ space, constrains $\sin^2θ_{24}\lesssim10^{-2}$ and $|\varepsilon_{eμ}|\lesssim0.025$ at $95\%$~C.L., and resolves degeneracies that are intractable for either experiment alone. Our results establish that a multi-baseline strategy combining matter-rich and near-vacuum baselines is necessary for robust parameter extraction in the simultaneous presence of two new physics scenarios. It is also important to perform simultaneous new physics analyses to reliably interpret future precision neutrino oscillation data.
Comments24 pages, 8 figures, 2 tables; accepted for publication in Physics Letters B
