Boosted top quarks in the peak region with N L 3 L resummation
Boosted top quarks in the peak region with N L 3 L resummation
复制标题
通过 N L 3 L 恢复增强峰区的顶夸克
DOI：
10.1103/physrevd.104.014026
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发表时间：
2021
影响因子：
5
通讯作者：
Bachu B
中科院分区：
文献类型：
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作者：
Bachu B
我们给出了在峰区碰撞产生的增强顶夸克对的2-jettiness微分分布的结果，解释了次领先对数阶的QCD大对数恢复以及对次次领先阶矩阵元素的固定阶修正。在软共线有效理论和增强重夸克有效理论的框架下计算。电弱效应和有限宽度效应被包括在主导顺序。我们研究了在极和MSR质量方案，有和没有软间隙减法的截面的微扰收敛。我们发现，在极质量和软函数重正子之间存在部分抵消。当重正隆减法关于顶部的质量和软功能的实施，微扰的不确定性，但是，系统较小，并观察到的峰位的稳定性的改善。我们发现，顶MSR质量可以确定与扰动的不确定性远低于100兆电子伏的2 jettiness分布的峰值位置。这一结果对蒙特卡罗顶夸克质量校准有重要的应用。
We present results for the 2-jettiness differential distribution for boosted top quark pairs produced incollisions in the peak region accounting for QCD large-logarithm resummation at next-to-next-to-next-to-leading logarithmic order and fixed-order corrections to matrix elements at next-to-next-to-leading order calculated in the framework of soft-collinear effective theory and boosted heavy quark effective theory. Electroweak and finite-width effects are included at leading order. We study the perturbative convergence of the cross section in the pole and MSR mass schemes, with and without soft gap subtractions. We find that there is a partial cancellation between the pole mass and soft function renormalons. When renormalon subtractions concerning the top mass and the soft function are implemented, the perturbative uncertainties are, however, systematically smaller and an improvement in the stability of the peak position is observed. We find that the top MSR mass may be determined with perturbative uncertainties well below 100 MeV from the peak position of the 2-jettiness distribution. This result has important applications for Monte Carlo top quark mass calibrations.