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arXiv 2405.01643hep-th
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天体弦:场论、共形软极限以及将世界面映射到天体球

Celestial strings: field theory, conformally soft limits, and mapping the worldsheet onto the celestial sphere

Lina Castiblanco, Gaston Giribet, Gabriel Marin, Francisco Rojas

AI总结:

本文计算了 type I 超弦理论中树图级 5-胶子振幅的天体关联子,研究了如何在天体基中恢复场论极限,并探讨了共形软定理、有效场论展开及世界面到天体球的映射等性质。

摘要:

我们计算了对应于 type I 超弦理论中树图级 5-胶子振幅的天体关联子。由于天体关联函数是通过对全能量范围进行积分获得的,因此在该基中不存在 $α' \ o 0$ 极限的明显类似物。这一点通过天体弦振幅中 $α'$ 依赖性的因子化得到了明显展示。因此,问题 arises 为如何在天体基中从弦论恢复出场论极限。文献中已经针对树图级 4-胶子振幅的情况讨论了这一问题,其中弦因子的前向散射极限被确定为恢复天体 Yang-Mills 4-点函数的极限。在此,我们将分析扩展到五胶子情况,其弦模空间允许更多类型的极限,从而能够更详细地研究这一方面。仅基于天体数据,我们研究了能够得到正确天体场论极限的机制。我们还研究了天体弦振幅的其他性质,即共形软定理、共形基中的有效场论展开,以及在无质量 $n$-点弦振幅的高能/大标度维度机制下产生的、将带穿孔的弦世界面连接到天体 CFT 中初级算符插入的映射。

英文摘要:

We compute the celestial correlators corresponding to tree-level 5-gluon amplitudes in the type I superstring theory. Since celestial correlation functions are obtained by integrating over the full range of energies, there is no obvious analog of the $α' \to 0$ limit in this basis. This is manifestly shown by a factorization of the $α'$ dependence in the celestial string amplitudes. Consequently, the question arises as to how the field theory limit is recovered from string theory in the celestial basis. This problem has been addressed in the literature for the case of 4-gluon amplitudes at tree level, where the forward scattering limit of the stringy factor was identified as a limit in which celestial Yang-Mills 4-point function is recovered. Here, we extend the analysis to the case with five gluons, for which the string moduli space allows for more types of limits, thus allowing to investigate this aspect in more detail. Based on celestial data only, we study the regime in which one arrives at the correct celestial field theory limit. We also study other properties of the celestial string amplitudes, namely, the conformally soft theorem, effective field theory expansion in the conformal basis, and a map that arises in the regime of high-energy/large-scaling dimension that connects the punctured string worldsheet to the insertion of primary operators in the celestial CFT for the massless $n$-point string amplitude.

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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