arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2109.09706hep-ph
收藏

着色混合QCD/QED演变

Coloring mixed QCD/QED evolution

Leif Gellersen, Stefan Prestel, Michael Spannowsky

摘要:

部分子簇射是高能物理计算的重要组成部分。改进他们的QCD模型是一个活跃的研究领域,因为簇射近似是精确事件发生器的绊脚石。简单地说,次主导的标准模型相互作用和QCD之间的干扰可以与次主导的QCD修正具有相似的大小。本文通过发展一个包含QED、QCD的复杂簇射,并对单个$N_C=3$色组态采用完全的树级矩阵元修正来嵌入干涉,评估了QCD/QED干涉效应对部分子簇射的影响。结果表明,QCD/QED干涉效应是一个简单的测试情况下很小的和相形见绌的电弱共振效应。

英文摘要:

Parton showers are crucial components of high-energy physics calculations. Improving their modelling of QCD is an active research area since shower approximations are stumbling blocks for precision event generators. Naively, the interference between sub-dominant Standard-Model interactions and QCD can be of similar size to subleading QCD corrections. This article assesses the impact of QCD/QED interference effects in parton showers, by developing a sophisticated shower including QED, QCD at fixed color, and employing complete tree-level matrix element corrections for individual $N_C=3$ color configurations to embed interference. The resulting simulation indicates that QCD/QED interference effects are small for a simple test case and dwarfed by electro-weak resonance effects.

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。

↑