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arXiv 2106.01374hep-thhep-ph
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引导双环路四点形状因子

Bootstrapping a Two-Loop Four-Point Form Factor

Yuanhong Guo, Lei Wang, Gang Yang

摘要:

本文计算了N=4平面SYM中长度为3的半BPS算子的两圈四点形状因子,它属于具有一个离壳色单腿的两圈五点散射观测量。一个新的自举策略的开发,以获得这一结果,通过开始与一个扩展的主积分,然后通过各种物理约束求解主系数的anterior。我们发现,一致性条件的红外发散和共线的限制,连同取消虚假极点,可以固定的一个显着的一部分的Anonymous。剩余的自由度可以通过一种简单的两重么正切割来固定。提供了符号和Goncharov多项式的完整分析结果。

英文摘要:

We compute the two-loop four-point form factor of a length-3 half-BPS operator in planar N=4 SYM, which belongs to the class of two-loop five-point scattering observables with one off-shell color-singlet leg. A new bootstrapping strategy is developed to obtain this result by starting with an ansatz expanded in terms of master integrals and then solving the master coefficients via various physical constraints. We find that consistency conditions of infrared divergences and collinear limits, together with the cancellation of spurious poles, can fix a significant part of the ansatz. The remaining degrees of freedom can be fixed by one simple type of two-double unitarity cut. Full analytic results in terms of both symbol and Goncharov polylogarithms are provided.

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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