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arXiv 2203.14730hep-thhep-ph
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QED的BCFW方法的偏移

Shifts in BCFW method for QED

Ke Li, Yuxin Liu, Qi-Shu Yan, Xiaoran Zhao

摘要:

研究了BCFW递推关系在QED过程$0\to e^- e^+ n γ$中的应用。基于Berends-Giele规范中Feynman图计算的6点振幅(MHVA和NMHVA),我们对所有不同的位移进行了全面的研究。然后,我们提出了一个新的移位(LLYZ移位),它可以导致这些过程的全振幅,并可以有一些现实的计算优势。我们比较了几个典型的移位的条款和独立的振幅,这种新的移位。

英文摘要:

We study the application of BCFW recursion relations to the QED processes $0\to e^- e^+ n γ$. Based on 6-point amplitudes (both MHVA and NMHVA) computed from Feynman diagrams in the Berends-Giele gauge, we conduct a comprehensive study on all different shifts. Then we propose a new shift (LLYZ shift) which can lead to the full amplitudes for these processes and can have some realistic computation advantages. We compare the number of terms and the independent amplitudes of this novel shift with a few typical shifts.

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。

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