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北美退伍军人节(Veterans Day),12 日无更新
arXiv 1312.7878hep-thmath.AG
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进入Amplituhedron

Into the Amplituhedron

Nima Arkani-Hamed, Jaroslav Trnka

摘要:

我们开始探索的物理和几何的振幅面体,从最简单的情况下,平面N = 4 SYM的四粒子散射的被积函数。我们展示了如何教科书结构的么正双切遵循正几何。我们还使用几何来揭示多重共线极限的行为,为研究振幅的对数提供了直接的动机。除了计算两个和三个循环的被积函数,我们探索各种低维面的振幅面体,从而计算非平凡的削减的被积函数的所有循环订单。

英文摘要:

We initiate an exploration of the physics and geometry of the amplituhedron, starting with the simplest case of the integrand for four-particle scattering in planar N=4 SYM. We show how the textbook structure of the unitarity double-cut follows from the positive geometry. We also use the geometry to expose the behavior of the multicollinear limit, providing a direct motivation for studying the logarithm of the amplitude. In addition to computing the two and three-loop integrands, we explore various lower-dimensional faces of the amplituhedron, thereby computing non-trivial cuts of the integrand to all loop orders.

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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