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arXiv 1104.2890hep-th
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扭转空间中的散射振幅和威尔逊圈

Scattering Amplitudes and Wilson Loops in Twistor Space

Tim Adamo, Mathew Bullimore, Lionel Mason, David Skinner

摘要:

本文综述了N=4超杨-米尔斯的威尔逊圈、振幅及其对偶性的扭量方法的最新进展。威尔逊圈和振幅来自第一原理使用扭量作用的最大超对称杨米尔斯理论。我们首先推导出MHV规则的规范理论振幅从扭量作用在一个轴向规范在扭量空间,并表明,这引起了原来的动量空间版本的Cachazo,Svrcek和威滕。然后,我们继续获得从这些建设的动量扭量空间回路被积函数使用(平面)MHV规则,并显示它是如何产生的期望值的全纯威尔逊圈在扭量空间。我们解释了全纯威尔逊圈和某些光锥极限的关联函数之间的联系。我们给出了一个简短的审查其他想法与振幅在扭量空间:扭弦,递归在扭量空间,格拉斯曼剩余公式领导奇点和振幅作为多面体。这篇文章是《物理学杂志A》专刊“规范理论中的散射振幅”的特邀评论。

英文摘要:

This article reviews the recent progress in twistor approaches to Wilson loops, amplitudes and their duality for N=4 super Yang-Mills. Wilson loops and amplitudes are derived from first principles using the twistor action for maximally supersymmetric Yang-Mills theory. We start by deriving the MHV rules for gauge theory amplitudes from the twistor action in an axial gauge in twistor space, and show that this gives rise to the original momentum space version given by Cachazo, Svrcek and Witten. We then go on to obtain from these the construction of the momentum twistor space loop integrand using (planar) MHV rules and show how it arises as the expectation value of a holomorphic Wilson loop in twistor space. We explain the connection between the holomorphic Wilson loop and certain light-cone limits of correlation functions. We give a brief review of other ideas in connection with amplitudes in twistor space: twistor-strings, recursion in twistor space, the Grassmannian residue formula for leading singularities and amplitudes as polytopes. This article is an invited review for a special issue of Journal of Physics A devoted to `Scattering Amplitudes in Gauge Theories'.

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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