Scattering amplitudes computed by superstring perturbation theory are known to holomorphically split into chiral half-integrands at fixed internal loop momentum. It is established by direct computation that, upon reduction to the ordinary moduli space, the chiral half-integrands of the superstring match those computed by the ambitwistor string in the limit of zero tension (${\alpha }^{\prime }\to \infty$). Subtleties that arise at higher genus due to the nonprojectedness of the supermoduli space are considered and arguments as to their resolution are furnished.

中文翻译：

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手性分裂和 ambitwistor 字符串

已知由超弦微扰理论计算的散射幅度在固定的内环动量下全纯地分裂为手性半积函数。通过直接计算可以确定，在归约到普通模空间时，超弦的手征半积函数与在零张力极限下的横向扭曲弦计算的相匹配（${\alpha }^{\prime }\to \infty$）。考虑了由于超模空间的非投影性而在较高属上出现的微妙之处，并提供了有关其分辨率的论据。