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arXiv 1004.3983hep-th
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强耦合下4K胶子的散射振幅

Scattering amplitudes at strong coupling for 4K gluons

Gang Yang

摘要:

本文研究了胶子数为4的倍数时强耦合下的散射振幅。这是arXiv:1002.2459中重要的缺失部分。对于n=4K,棘手的一点是,在这种情况下存在一些偶然的简并。我们详细解释了这一点,并表明,一个非平凡的monodromy无穷大的世界表坐标变换中出现的计算。事实证明,除了求解Y系统之外,我们还需要计算T函数来计算全振幅。我们证明了T函数可以通过取Y函数的一个极限导出。作为检验,我们得到了AdS_3情形下八点的已知结果。

英文摘要:

In this paper we study the scattering amplitudes at strong coupling for the case where the number of gluons is a multiple of four. This is an important missing piece in arXiv:1002.2459. The tricky point for n=4K is that there is some accidental degeneracy in such case. We explain this point in detail and show that a non-trivial monodromy around infinity was developed by the world-sheet coordinate transformation appearing in the computation. It turns out that besides solving the Y system, we also need to calculate T functions to compute the full amplitudes. We show that the T functions can be derived by taking a limit of Y functions of a higher-point case. As a check, we obtain the known result of eight-point in AdS_3 case.

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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