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N=8 Supergravity on the Light Cone

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arxiv 0903.4630 v2 pith:Q27RI5W2 submitted 2009-03-26 hep-th

classification hep-th
keywords light-coneamplitudeschiralsuperfieldfunctionalloopssupergravitysuperspace
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We construct the generating functional for the light-cone superfield amplitudes in a chiral momentum superspace. It generates the n-point particle amplitudes which on shell are equivalent to the covariant ones. Based on the action depending on unconstrained light-cone chiral scalar superfield, this functional provides a regular d=4 QFT path integral derivation of the Nair-type amplitude constructions. By performing a Fourier transform into the light-cone chiral coordinate superspace we find that the quantum corrections to the superfield amplitudes with n legs are non-local in transverse directions for the diagrams with the number of loops smaller than n(n-1)/2 +1. This suggests the reason why UV infinities, which are proportional to local vertices, cannot appear at least before 7 loops in the light-cone supergraph computations. By combining the E7 symmetry with the supersymmetric recursion relations we argue that the light-cone supergraphs predict all loop finiteness of d=4 N=8 supergravity.

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  1. Circumnavigating Collinear Superspace

    hep-th 2019-08 conditional novelty 7.0 of 10

    Collinear superspace can reproduce the full range of N=1 supersymmetric Lagrangians by adding auxiliary superfields that encode F and D terms.

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