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arXiv 1803.00527hep-thmath.NT
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从椭圆多重zeta值到模图函数:一个循环中的开和闭字符串

From elliptic multiple zeta values to modular graph functions: open and closed strings at one loop

Johannes Broedel, Oliver Schlotterer, Federico Zerbini

摘要:

我们将无质量开弦和闭弦态的单圈散射振幅与它们的低能量展开联系起来。从闭弦穿刺的集成所产生的模块化图功能,观察到以下从对称开弦积分通过一个试探性的推广单值投影已知的亏格零。

英文摘要:

We relate one-loop scattering amplitudes of massless open- and closed-string states at the level of their low-energy expansion. The modular graph functions resulting from integration over closed-string punctures are observed to follow from symmetrized open-string integrals through a tentative generalization of the single-valued projection known from genus zero.

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