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arXiv 1003.2396hep-th
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重力振幅的单值性和Kawai-Lewellen-Tye关系

Monodromy and Kawai-Lewellen-Tye Relations for Gravity Amplitudes

N. E. J. Bjerrum-Bohr, Pierre Vanhove

摘要:

我们仍在学习弦论激发的Kawai-Lewellen-Tye(KLT)关系的有趣的新方面,KLT关系将杨-米尔斯理论中的振幅乘积与引力中的振幅联系起来。这在N=8的超引力计算中表现得非常清楚,其中微扰展开显示出与N=4的超杨-米尔斯有大量的相似之处。在这里,我们将研究基于杨-米尔斯振幅的单值关系的恒等式如何对组织和进一步简化KLT关系非常有用,从而产生更紧凑的重力振幅结果。

英文摘要:

We are still learning intriguing new facets of the string theory motivated Kawai-Lewellen-Tye (KLT) relations linking products of amplitudes in Yang-Mills theories and amplitudes in gravity. This is very clearly displayed in computations of N=8 supergravity where the perturbative expansion show a vast number of similarities to that of N=4 super-Yang-Mills. We will here investigate how identities based on monodromy relations for Yang-Mills amplitudes can be very useful for organizing and further streamlining the KLT relations yielding even more compact results for gravity amplitudes.

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