论文标题
无质量闭合字符串与任意数量的封闭弦Tachyons相互作用的双重柔软行为
Double-soft behavior of massless closed strings interacting with any number of closed string tachyons
论文作者
论文摘要
我们将两个无质量闭合字符串散射的双柔软限制与在树级别的转向订单中的任何数量的封闭串tachyons一起计算。极限将散射幅度分配到一个双soft因子中，将纯正的tachyon次级繁殖倍增，这表明对无质量封闭的字符串进行了通用的双斜线定理。我们以相同的壳相同但不同的形式证实了双柔软的重力的现有结果，同时还建立了弦乐dilaton和kalb-ramond State的双重分解行为，以及混合的Graviton-Dilaton案例。我们还表明，同时且连续的双soft定理彼此一致。此外，我们对我们的结果提供了完整的野外理论图理学观点，这使我们特别能够为两个tachyons和两个无质量的封闭弦状态建立一个四点相互作用顶点，以及在两个无质量封闭弦状态的三分相互作用的现场理论中缺少的缺失。
We calculate the simultaneous double-soft limit of two massless closed strings scattering with any number of closed string tachyons to the subleading order at the tree level. The limit factorizes the scattering amplitude into a double-soft factor multiplying the pure tachyon subamplitude, suggesting a universal double-soft theorem for the massless closed string. We confirm an existing result for the double-soft graviton in an on-shell equivalent, but different form, while also establishing the double-soft factorization behavior of the string dilaton and of the Kalb-Ramond state, as well as the mixed graviton-dilaton case. We also show that the simultaneous and consecutive double-soft theorems are consistent with each other. We furthermore provide a complete field theory diagrammatic view on our result, which enables us in particular to establish a four-point interaction vertex for two tachyons and two massless closed string states, as well as the missing in field theory of three-point interaction of two massless closed string state and one tachyon.
