论文标题
弦散射幅度的plahte图
Plahte Diagrams for String Scattering Amplitudes
论文作者
论文摘要
plahte的身份是从Koba-Nielsen公式衍生的树级的开放式弦散射幅度之间的单型关系。我们通过复杂平面中的多边形表示这些身份。这些图使幅度分析延续中的符号变化和奇异性的外观。它们提供了封闭弦和开放字符串幅度之间KLT关系的几何表达。我们还将图表连接到BCFW内递归关系，并将其推广到复杂的动量，从而导致部分振幅的复杂阶段之间存在关系。
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.
