The Yangian origin of the Grassmannian integral

Details The Yangian origin of the Grassmannian integral The Yangian origin of the Grassmannian integral

2010-02-25

arxiv.org/abs/1002.4622v2

JHEP 1012:010,2010

Physics

High Energy Physics

High Energy Physics - Theory

26 pages. v2: typos corrected, published version

Scientific paper

10.1007/JHEP12(2010)010

In this paper we analyse formulas which reproduce different contributions to scattering amplitudes in N=4 super Yang-Mills theory through a Grassmannian integral. Recently their Yangian invariance has been proved directly by using the explicit expression of the Yangian level-one generators. The specific cyclic structure of the form integrated over the Grassmannian enters in a crucial way in demonstrating the symmetry. Here we show that the Yangian symmetry fixes this structure uniquely.

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