Cat's Cradle 图用于子结构研究
Cat's cradle diagrams for substructure studies
- Monash University（莫纳什大学）
机构由 AI 辅助整理，请以论文原文为准。
AI总结：
本文提出 Cat's Cradle 图框架，通过中间幂次计数 N^nLJ 量化已分辨喷注子结构的参数精度，在固定阶与软-共线重求和之间提供补充量化，并应用于约 200 GeV 硬过程的簇射。
AI中文摘要：
我们提出 Cat's Cradle 图作为一个框架，用于分析规范量子场论在不同运动学区域中的微扰精度，在固定阶微扰论和软-共线重求和之间的幂次计数之间进行插值。我们提出一种简单的中间计数，旨在量化已分辨喷注子结构的参数精度，其嵌套关系为 $N^nLO \subset N^nLJ \subset N^{n+1}LL$。我们表明，已分辨喷注子结构的幂次计数 $N^nLJ$ 强调了对于已分辨子结构重要但在另外两种计数中与不太主要的项混在一起的贡献。因此，它可以在硬（固定阶）和软-共线（重求和）区域之间的“中间”运动学区域中提供相对参数精度的补充量化。我们讨论了在具有约 200 GeV 特征硬标度的硬过程背景下，对部分子簇射的实际应用。
英文摘要：
We propose Cat's Cradle diagrams as a framework to analyse the perturbative accuracy of gauge quantum field theories across different kinematic regions, interpolating between the power countings of fixed-order perturbation theory and soft-collinear resummation. We propose a simple intermediate counting aimed at quantifying parametric accuracy for resolved jet substructure, nested so that $N^nLO \subset N^nLJ \subset N^{n+1}LL$. We show that the resolved jet-substructure power counting, $N^nLJ$, emphasises contributions that are important for resolved substructure but which are lumped together with less dominant terms in both of the two other countings. It may therefore furnish a complementary quantification of relative parametric accuracy in a kinematic region "midway" between the hard (fixed-order) and soft-collinear (resummation) regimes. We discuss practical applications to parton showers, in the context of a hard process with a characteristic hard scale of order 200 GeV.
