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arXiv 1902.05951hep-th
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从振幅面体进行全循环切割

All-loop cuts from the Amplituhedron

Cameron Langer, Akshay Yelleshpur Srikant

摘要:

振幅面体在符号翻转方面的定义涉及单圈约束和“相互正性”约束。为了理解$\mathcal{N}=4$ sYM的全回路被积函数,需要理解相互正性所起的关键作用。本文试图发展一个程序,以系统和受控的方式介绍相互积极性的复杂性。在这个过程中的第一步,我们trivialize这些约束,并了解几何基础的所有循环和多重性的其余约束。我们提出了一个主机的配置,对应于各种面的振幅面体。我们得到的结果是有效的,在所有的多重性和环阶的最大螺旋违反(MHV)配置。这些包括arXiv:1810.08208 [hep-th]中结果的详细推导。最后,我们指出如何超越平凡的相互积极性,提出了一系列的配置,重新介绍它一点一点。

英文摘要:

The definition of the amplituhedron in terms of sign flips involves both one-loop constraints and the "mutual positivity" constraint. To gain an understanding of the all-loop integrand of $\mathcal{N}=4$ sYM requires understanding the crucial role played by mutual positivity. This paper is an attempt towards developing a procedure to introduce the complexities of mutual positivity in a systematic and controlled manner. As the first step in this procedure, we trivialize these constraints and understand the geometry underlying the remaining constraints to all loops and multiplicities. We present a host of configurations which correspond to various faces of the amplituhedron. The results we derive are valid at all multiplicities and loop orders for the maximally helicity violating (MHV) configurations. These include detailed derivations for the results in arXiv:1810.08208 [hep-th]. We conclude by indicating how one might move beyond trivial mutual positivity by presenting a series of configuration which re-introduce it bit by bit.

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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