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arXiv 0905.3738hep-th
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严格N=4超共形对称

Exacting N=4 Superconformal Symmetry

Till Bargheer, Niklas Beisert, Wellington Galleas, Florian Loebbert, Tristan McLoughlin

摘要:

在N = 4超共形代数的自由作用下,N =4超Yang-Mills理论中的树层散射振幅几乎不变,但不是完全不变.导致非不变性的原因是在极点处的全纯异常,在那里外部粒子成为共线的。在本文中,我们提出了一个变形的自由超共形表示的贡献,改变外部腿的数量。这种修改后的经典表示不仅使树的振幅完全不变,但它也导致额外的限制,从对称性之间迄今无关的振幅调解。此外,在一个建设性的方法,它似乎完全约束所有的树振幅时,结合双超共形别名杨对称。

英文摘要:

Tree level scattering amplitudes in N=4 super Yang-Mills theory are almost, but not exactly invariant under the free action of the N=4 superconformal algebra. What causes the non-invariance is the holomorphic anomaly at poles where external particles become collinear. In this paper we propose a deformation of the free superconformal representation by contributions which change the number of external legs. This modified classical representation not only makes tree amplitudes fully invariant, but it also leads to additional constraints from symmetry alone mediating between hitherto unrelated amplitudes. Moreover, in a constructive approach it appears to fully constrain all tree amplitudes when combined with dual superconformal alias Yangian symmetry.

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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