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arXiv 2608.14278hep-phcs.LGhep-ex

Pairton:短寿命粒子的迭代重建

Pairton: Iterative Reconstruction of Short-Lived Particles

  • University of Geneva(日内瓦大学)
  • CERN(欧洲核子研究中心)

机构由 AI 辅助整理,请以论文原文为准。

Andreas Hermansen, Chris Scheulen, Tobias Golling

AI总结:

该研究提出Pairton框架,将粒子重建转化为图结构掩码预测过程,结合Pairformer架构与全局事件一致性,在全强子化顶夸克对衰变任务上达最优性能,为粒子重建提供通用范式。

AI中文摘要:

我们提出了Pairton,一种用于重建高能碰撞事件中短寿命粒子的迭代框架。通过将粒子重建表述为图结构上的掩码预测过程,Pairton学习与衰变产物因子分解一致的条件分布,并迭代预测代表粒子衰变关系的邻接矩阵中的边。利用基于Pairformer的架构及动态更新的成对表示,该方法融入了全局事件一致性。我们在全强子化顶夸克对($t\bar{t}$)衰变任务上展示了最先进的性能。Pairton为粒子重建提供了通用灵活的范式,可轻松扩展至其他拓扑结构,衔接了现代生成式建模与高能物理的思想。

英文摘要:

We present Pairton, an iterative framework for reconstructing short-lived particles in high-energy collision events. By formulating particle reconstruction as a masked prediction process over graph structures, Pairton learns conditional distributions consistent with a factorised decomposition of decay products and iteratively predicts edges in the adjacency matrix representing particle decay relationships. Leveraging a pairformer-based architecture with dynamically updated pairwise representations, our method incorporates global event consistency. We demonstrate state-of-the-art performance on fully hadronic $t\bar{t}$ decays. Pairton provides a general, flexible paradigm for particle reconstruction and can be readily extended to other topologies, bridging ideas from modern generative modelling and high-energy physics.

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