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arXiv 1310.6906hep-th
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具有特殊二维运动学的散射振幅中的团代数

Cluster algebras in scattering amplitudes with special 2D kinematics

Marcus A. C. Torres

摘要:

研究了n粒子散射振幅运动学位形空间$Conf_n(\mathbb{P}^3)$的团簇代数。我们发现,在特殊的2D运动学的n点两个循环MHV剩余功能取决于选择的\XX -坐标的一部分,一个特殊的结构的集群代数相关的蛇三角形的多边形。这种结构在相应的Stasheff多面体中形成了一串超立方体珠子。此外,在$n = 12$中,特殊2D运动学中的簇代数和\XX -坐标的选择复制了4D运动学中$n=6$双环MHV振幅的簇代数和\XX -坐标的选择。

英文摘要:

We study the cluster algebra of the kinematic configuration space $Conf_n(\mathbb{P}^3)$ of a n-particle scattering amplitude restricted to the special 2D kinematics. We found that the n-points two loop MHV remainder function found in special 2D kinematics depend on a selection of \XX-coordinates that are part of a special structure of the cluster algebra related to snake triangulations of polygons. This structure forms a necklace of hypercubes beads in the corresponding Stasheff polytope. Furthermore in $n = 12$, the cluster algebra and the selection of \XX-coordinates in special 2D kinematics replicates the cluster algebra and the selection of \XX-coordinates of $n=6$ two loop MHV amplitude in 4D kinematics.

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