大型强子对撞机产生无色粒子的快速分布阈值恢复

Pulak Banerjee, Goutam Das, P. K. Dhani, V. Ravindran
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引用次数: 2

摘要

我们提出了一种将任意无色粒子在强子对撞机上的快速分布的大阈值对数恢复到微扰QCD中所有阶的形式。利用在二维Mellin空间中导出的恢复系数,我们给出了在大型强子对撞机上希格斯粒子的速度分布,以及Drell-Yan生产对NNLO+NNLL精度的影响。在这两种情况下,恢复分布对非物理重整化和分解尺度的变化都能给出稳定的预测。恢复结果的加入也改善了微扰收敛性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Threshold resummation in the rapidity distribution for a colorless particle production at the LHC
We present a formalism to resum large threshold logarithms to all orders in perturbative QCD for the rapidity distribution of any colorless particle at the hadron colliders. Using the derived resummed coefficients in two dimensional Mellin space, we present the rapidity distributions for the Higgs as well as for the Drell-Yan production to NNLO+NNLL accuracy at the LHC. The resummed distributions give stable prediction against the variation of unphysical renormalisation and factorisation scales in both the cases. Perturbative convergence is also improved with the inclusion of the resummed result.
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