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arXiv 1412.2256hep-th
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从自旋顶点到弦顶点

From Spin Vertex to String Vertex

Yunfeng Jiang, Andrei Petrovskii

摘要:

在最近的出版物arXiv:1410.8860中,自旋顶点被引入作为计算N = 4 SYM中的三点函数的新方法。本文考虑标量激发自旋顶点的BMN极限,并证明它再现了光锥弦场论中描述pp波背景下弦相互作用的BMN展开阶数的弦顶点。这是通过引入自旋顶点的多项式表示来实现的。在弱耦合下,我们从自旋顶点导出了Neumann系数,并表明它们与弦场论的Neumann系数相匹配。

英文摘要:

In the recent publication arXiv:1410.8860 the spin vertex was introduced as a new approach for computing three-point functions in N = 4 SYM. In this note we consider the BMN limit of the spin vertex for scalar excitations and show that it reproduces the string vertex in the light-cone string field theory which describes the string interactions in the pp-wave background at the leading order of BMN expansion. This is achieved by introducing a polynomial representation for the spin vertex. We derive the Neumann coefficients from the spin vertex at weak coupling and show they match with the Neumann coefficients from the string field theory.

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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