Graviton-Form Invariants in D=11 Supergravity
S. Deser, D. Seminara

TL;DR
This paper completes the derivation of 4-point bosonic scattering amplitudes and supersymmetric invariants in D=11 supergravity, focusing on form-curvature terms like F^2 R^2.
Contribution
It introduces the explicit form-curvature terms in the invariants, advancing the understanding of supersymmetric structures in eleven-dimensional supergravity.
Findings
Derived the form-curvature, F^2 R^2, terms in the invariants.
Completed the 4-point bosonic scattering amplitude calculations.
Enhanced the explicit formulation of supersymmetric invariants.
Abstract
We complete an earlier derivation of the 4-point bosonic scattering amplitudes, and of the corresponding linearized local supersymmetric invariants in D=11 supergravity, by displaying the form-curvature, F^2 R^2, terms.
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