arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0912.4534hep-ph
收藏

虚有序部分子簇射中Z玻色子产生的横动量

On the transverse momentum in Z-boson production in a virtuality ordered parton shower

Zoltan Nagy, Davison E. Soper

摘要:

在同一物理过程中,如果物理过程的截面涉及到非常不同的动量尺度,那么用微扰理论计算时,这些物理过程的截面将涉及到动量尺度比的大的平方。使用部分子簇射的计算的一个目标是对这些大的矩阵求和。我们问这个目标是否实现的横向动量分布的Z-玻色子产生的强子-强子碰撞时,淋浴是有组织的高虚拟部分子分裂来第一,其次是较低的虚拟部分子分裂。我们发现,虚拟有序簇射在重现已知的QCD结果。

英文摘要:

Cross sections for physical processes that involve very different momentum scales in the same process will involve large logarithms of the ratio of the momentum scales when calculated in perturbation theory. One goal of calculations using parton showers is to sum these large logarithms. We ask whether this goal is achieved for the transverse momentum distribution of a Z-boson produced in hadron-hadron collisions when the shower is organized with higher virtuality parton splittings coming first, followed successively by lower virtuality parton splittings. We find that the virtuality ordered shower works well in reproducing the known QCD result.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑