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arXiv 2005.01712hep-th
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弦散射振幅的Plahte图

Plahte Diagrams for String Scattering Amplitudes

Pongwit Srisangyingcharoen, Paul Mansfield

摘要:

Plahte恒等式是由Koba-Nielsen公式导出的开弦散射振幅之间在树水平上的单值关系。我们用复平面上的多边形来表示这些恒等式。这些图表明了振幅解析延拓中符号变化和奇异性的出现。它们提供了闭弦振幅和开弦振幅之间KLT关系的几何表达式。我们还连接到BCFW壳递归关系图,并将其推广到复杂的动量,从而在复杂的相位之间的关系的部分振幅。

英文摘要:

Plahte identities are monodromy relations between open string scattering amplitudes at tree level derived from the Koba-Nielsen formula. We represent these identities by polygons in the complex plane. These diagrams make manifest the appearance of sign changes and singularities in the analytic continuation of amplitudes. They provide a geometric expression of the KLT relations between closed and open string amplitudes. We also connect the diagrams to the BCFW on-shell recursion relations and generalise them to complex momenta resulting in a relation between the complex phases of partial amplitudes.

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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