非平面多环振幅中主导奇点的顶形式
高能物理 - 理论
2018-02-20 v2
摘要
二分图上壳图是构造散射振幅的最新工具。在本文中,我们证明一个Britto-Cachazo-Feng-Witten (BCFW)可分解的上壳图具有有理顶形式当且仅当由几何约束构成的代数理想在连续BCFW积分过程中被线性移动。借助在Grassmannian流形中对约束的适当几何解释,有理顶形式的积分轮廓因此可以直接地获得和理解。因此,只要相应的上壳图是BCFW可分解的,任意高圈主导奇点的所有有理顶形式被积函数都可以递归推导。
引用
@article{arxiv.1506.02880,
title = {Top-forms of Leading Singularities in Nonplanar Multi-loop Amplitudes},
author = {Baoyi Chen and Gang Chen and Yeuk-Kwan E. Cheung and Ruofei Xie and Yuan Xin},
journal= {arXiv preprint arXiv:1506.02880},
year = {2018}
}
备注
This article has been merged with arXiv:1411.3889 and published in Eur.Phys.J. C. Thanks for the citations! and please cite "Eur.Phys.J. C77 (2017) no.2, 80" from now on