arXiv:2603.22342hep-phcs.LG2026-03中稿 · appear in the IEEE…被引 1

用分层变压器高效估算中微子振荡参数,速度提升240倍

Neutrino Oscillation Parameter Estimation Using Structured Hierarchical Transformers

  • 构建分层Transformer模型,显式捕捉振荡图的二维结构
  • 相比蒙特卡洛方法,计算量减少240倍,处理速度提升33倍
  • 生成无分布假设的置信区间,覆盖率达90%且区间窄

中微子振荡蕴含中微子质量与混合参数的关键信息,是探索标准模型之外物理的重要窗口。然而,从振荡概率图中估计这些参数面临高维性与非线性依赖的挑战,传统似然或蒙特卡洛方法需大量模拟,成为大规模分析的瓶颈。本文提出一种数据驱动框架,将大气中微子振荡参数推断转化为对结构化振荡图的监督回归任务。设计分层Transformer架构,显式建模固定能量下的角度依赖与全能谱的全局相关性。为保证物理一致性,引入代理仿真约束,强制预测参数与重构振荡模式一致。进一步提出基于神经网络的不确定性量化机制,生成无需分布假设的预测区间,并具备形式化覆盖率保证。在地球物质效应下的模拟振荡图上实验表明,该方法估计精度媲美马尔可夫链蒙特卡洛基准,计算量减少约240倍,平均处理时间快33倍;校准后的预测区间在保持90%名义覆盖率的同时保持狭窄,验证了方法的可靠性与高效性。

原文摘要 · Abstract (English)

Neutrino oscillations encode fundamental information about neutrino masses and mixing parameters, offering a unique window into physics beyond the Standard Model. Estimating these parameters from oscillation probability maps is, however, computationally challenging due to the maps' high dimensionality and nonlinear dependence on the underlying physics. Traditional inference methods, such as likelihood-based or Monte Carlo sampling approaches, require extensive simulations to explore the parameter space, creating major bottlenecks for large-scale analyses. In this work, we introduce a data-driven framework that reformulates atmospheric neutrino oscillation parameter inference as a supervised regression task over structured oscillation maps. We propose a hierarchical transformer architecture that explicitly models the two-dimensional structure of these maps, capturing angular dependencies at fixed energies and global correlations across the energy spectrum. To improve physical consistency, the model is trained using a surrogate simulation constraint that enforces agreement between the predicted parameters and the reconstructed oscillation patterns. Furthermore, we introduce a neural network-based uncertainty quantification mechanism that produces distribution-free prediction intervals with formal coverage guarantees. Experiments on simulated oscillation maps under Earth-matter conditions demonstrate that the proposed method is comparable to a Markov Chain Monte Carlo baseline in estimation accuracy, with substantial improvements in computational cost (around 240$\times$ fewer FLOPs and 33$\times$ faster in average processing time). Moreover, the conformally calibrated prediction intervals remain narrow while achieving the target nominal coverage of 90%, confirming both the reliability and efficiency of our approach.

中微子变压器参数估计不确定性量化

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