arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2102.08225hep-ph
收藏

利用辅助质量流简化单顶生产的平面双箱图

Reduction of planar double-box diagram for single-top production via auxiliary mass flow

Najam ul Basat, Zhao Li, Yefan Wang

摘要:

单顶产生是LHC验证标准模型和寻找标准模型之外新物理的重要过程。虽然对单顶产生的完全次-次-首阶(NNLO)QCD修正是至关重要的,但目前这种计算仍然具有挑战性。为了有效地降低NNLO单峰振幅,我们通过引入$ε$截断改进了辅助质量流(AMF)方法。为了演示,我们选择了一个典型的平面双箱图的$tW$生产。结果表明,形状因子中的一个系数对振幅的影响可以系统地化为198个标量积分的线性组合。

英文摘要:

The single-top production is an important process at the LHC to test the Standard Model (SM) and search for the new physics beyond the SM. Although the complete next-to-next-to-leading order (NNLO) QCD correction to the single-top production is crucial, this calculation is still challenging at present. In order to efficiently reduce the NNLO single-top amplitude, we improve the auxiliary mass flow (AMF) method by introducing the $ε$ truncation. For demonstration we choose one typical planar double-box diagram for the $tW$ production. It is shown that one coefficient of the form factors on its amplitude can be systematically reduced into the linear combination of 198 scalar integrals.

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。

↑