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arXiv 1109.0685hep-th
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关于弦论和场论中树级的初等关系

On Primary Relations at Tree-level in String Theory and Field Theory

Qian Ma, Yi-Jian Du, Yi-Xin Chen

摘要:

利用循环对称性、KK关系和BCJ关系,可以将规范理论和弦论中独立的$N$ -点色序树振幅从$N!$减少到$(N-3)!$ .在本文中,我们在树层次上研究了弦论和场论中的这些关系。我们将证明有两个主要的关系。所有其他关系都可以由主关系生成。在弦论中,基本关系可以选择为循环对称,也可以选择基本KK关系或基本BCJ关系。在场论中,基本关系只能选择为循环对称和基本BCJ关系。我们将进一步证明一种更一般的关系,它也可以由基本关系生成。本文给出并证明了色序开弦树振幅的显式最小基展开式的一般公式。

英文摘要:

By the use of cyclic symmetry, KK relations and BCJ relations, one can reduce the number of independent $N$-point color-ordered tree amplitudes in gauge theory and string theory from $N!$ to $(N-3)!$. In this paper, we investigate these relations at tree-level in both string theory and field theory. We will show that there are two primary relations. All other relations can be generated by the primary relations. In string theory, the primary relations can be chosen as cyclic symmetry as well as either the fundamental KK relation or the fundamental BCJ relation. In field theory, the primary relations can only be chosen as cyclic symmetry and the fundamental BCJ relation. We will further show a kind of more general relation which can also be generated by the primary relations. The general formula of the explicit minimal-basis expansions for color-ordered open string tree amplitudes will be given and proven in this paper.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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