arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1405.7850hep-ph
收藏

关于量子场论中散射振幅的奇异性

On the singular behaviour of scattering amplitudes in quantum field theory

Sebastian Buchta, Grigorios Chachamis, Petros Draggiotis, Ioannis Malamos, German Rodrigo

摘要:

我们分析了奇异行为的单圈积分和散射振幅的框架内的循环树对偶方法。我们发现,有一个部分取消的奇点之间的相应的对偶表示,可以解释的因果关系的不同组成部分的循环被积函数的水平。剩余的阈值和红外奇异性被限制在回路动量空间的有限区域内,该区域的大小与外部动量相同,并且可以映射到实修正的相空间以消除软发散和共线发散。

英文摘要:

We analyse the singular behaviour of one-loop integrals and scattering amplitudes in the framework of the loop--tree duality approach. We show that there is a partial cancellation of singularities at the loop integrand level among the different components of the corresponding dual representation that can be interpreted in terms of causality. The remaining threshold and infrared singularities are restricted to a finite region of the loop momentum space, which is of the size of the external momenta and can be mapped to the phase-space of real corrections to cancel the soft and collinear divergences.

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。

↑