利用与 T2HK 的高统计互补性在 ESSnuSB 中解决洛伦兹违反新物理
Resolving Lorentz-Violating New Physics at ESSnuSB Using High-Statistics Complementarity with T2HK
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中文总结 AI 辅助
研究下一代长基线中微子设施寻找普朗克尺度洛伦兹不变性违反问题，通过详细模拟发现 ESSnuSB 存在参数简并问题，利用其与 T2HK 的互补性可解决该问题，为打破 LIV 简并及建立相关物理界限提供有效框架。
中文摘要 AI 辅助
下一代长基线中微子设施的主要目标是寻找普朗克尺度的洛伦兹不变性违反（LIV）。本文探索了拟议的 ESSnuSB 和 T2HK 实验约束各向同性、违反 CPT 的 LIV 参数（$a_{\alpha\beta}$）的能力。LIV 参数引起的振荡概率修改会导致与大气混合角$\theta_{23}$和狄拉克 CP 破坏相位$\delta_{CP}$的参数简并。通过详细的 GLoBES 模拟发现，ESSnuSB 的第二振荡最大值配置对$\delta_{CP}$的精确相位有良好约束，但存在$\theta_{23}$错误八分体假解。将 ESSnuSB 的基线与 T2HK 的互补高统计测量相结合，可解决大多数 LIV 参数的简并。分析表明两者互补能提供有效框架来打破 LIV 引起的简并并建立普朗克尺度 LIV 物理的界限。
英文摘要
A primary objective for next-generation long-baseline neutrino facilities is the search for Planck-scale Lorentz Invariance Violation (LIV). In this work, we explore the capabilities of the proposed ESSnuSB and T2HK experiments to constrain isotropic, CPT-violating LIV parameters ($a_{αβ}$). The modifications to oscillation probabilities induced by these LIV parameters can introduce parameter degeneracies with the atmospheric mixing angle $θ_{23}$ and the Dirac CP-violating phase $δ_{CP}$, which can potentially result in incorrect determination of the said standard oscillation parameters if we do not account for LIV effects. Through detailed GLoBES simulations, we find that while the second-oscillation-maximum configuration of ESSnuSB yields good constraints on the exact phase of $δ_{CP}$, its intrinsic neutrino-antineutrino statistical asymmetry persistently leads to wrong octant fake solutions for $θ_{23}$. By synergizing ESSnuSB's 360 km and 540 km baselines with the complementary, high-statistics measurements from first-maximum configuration of the T2HK's 295 km baseline, we show that the degeneracies are resolved for most LIV parameters. Our analysis reflects how complementarity between ESSnuSB and T2HK provides an effective, matter-independent framework to break LIV-induced degeneracies and establish bounds on Planck-scale LIV physics.
