SYM n点树幅值的递归算法
A recursive method for SYM n-point tree amplitudes
摘要：
基于10维时空中纯旋量超空间的上同调，给出了超Yang-Mills色序n点树振幅的一种递推方法.振幅被组织成BRST协变构建块与图解解释。显式循环表达式（不超过一行）明确给出了n=10和更高的腿推广是直接的。
英文摘要：
We present a recursive method for super Yang-Mills color-ordered n-point tree amplitudes based on the cohomology of pure spinor superspace in ten space-time dimensions. The amplitudes are organized into BRST covariant building blocks with diagrammatic interpretation. Manifestly cyclic expressions (no longer than one line each) are explicitly given up to n=10 and higher leg generalizations are straightforward.
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