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arXiv 1804.03571hep-thhep-ph
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超共形沃德恒等式的振幅

Amplitudes from superconformal Ward identities

Dmitry Chicherin, Johannes M. Henn, Emery Sokatchev

摘要:

我们考虑N=1的物质的有限超级振幅,并使用超共形对称性,以获得强大的一阶微分方程。由于在壳共线奇点的存在,沃德恒等式存在一个反常,这个反常是由下回路信息得到的。我们表明,在五粒子的情况下,方程的解是唯一固定的预期的分析行为。我们将该方法应用于非平面双圈五粒子积分。

英文摘要:

We consider finite superamplitudes of N=1 matter, and use superconformal symmetry to derive powerful first-order differential equations for them. Due to on-shell collinear singularities, the Ward identities have an anomaly, which is obtained from lower-loop information. We show that in the five-particle case, the solution to the equations is uniquely fixed by the expected analytic behavior. We apply the method to a non-planar two-loop five-particle integral.

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