论文标题
四维无异常扭曲器弦
Four Dimensional Anomaly-Free Twistor String
论文作者
论文摘要
本文在四个维度上介绍了协变量扭曲器弦模型，该模型与二维世界表格重力相结合，无反常的BR电荷。该模型包含两个扭曲器和两个带有相关量规对称性的费米子双旋转器，以及扭曲器之间的SU（2）量规对称性。结果表明，该模型会导致熟悉的重力N $^K $ MHV振幅，并具有模块化不变的一环振幅。
This paper presents a covariant twistor string model in four dimensions coupled to two-dimensional worldsheet gravity with an anomaly-free BRST charge. The model contains two twistors and two fermionic bi-spinors with incidence related gauge symmetries and an SU(2) gauge symmetry between the twistors. It is shown that the model leads to familiar gravitational N$^k$MHV amplitudes and has modular-invariant one-loop amplitudes.
