论文标题
提高扰动理论中对喷气式修饰的理解
Improving the Understanding of Jet Grooming in Perturbation Theory
论文作者
论文摘要
喷气式修饰已成为精密喷气物理计划中必要且功能强大的工具。在本文中，我们介绍了扰动理论中的喷气修饰的三个结果，重点是$ e^+e^ - \ to $ hadrons碰撞的重型喷气质量，并用修改后的质量下降标签仪进行了修饰。首先，我们计算领先的分析横截面。其次，使用前阶结果和通过次接头到领先顺序的数值结果，我们表明，在较高阶的阶相空间内部分布中的尖端在较高的阶段中被软化。最后，使用分析和数值结果，我们表明违反了修饰喷射质量的分解定理的假设的术语在数值上比功率计数所预期的要小得多。这些结果提供了有关扰动理论的收敛性的重要信息，以精确计算，可观察到的射流可观测值和残留不确定性的可靠估计。
Jet grooming has emerged as a necessary and powerful tool in a precision jet physics program. In this paper, we present three results on jet grooming in perturbation theory, focusing on heavy jet mass in $e^+e^-\to$ hadrons collisions, groomed with the modified mass drop tagger. First, we calculate the analytic cross section at leading-order. Second, using the leading-order result and numerical results through next-to-next-to-leading order, we show that cusps in the distribution on the interior of phase space at leading-order are softened at higher orders. Finally, using analytic and numerical results, we show that terms that violate the assumptions of the factorization theorem for groomed jet mass are numerically much smaller than expected from power counting. These results provide important information regarding the convergence of perturbation theory for groomed jet observables and reliable estimates for residual uncertainties in a precision calculation.
