Second-order quantum graviton scattering in the null surface formulation yields perturbatively finite amplitudes that reproduce the s-channel Weinberg tree-level result in the Poincare limit via on-shell intermediate gravitons and Gaussian-smeared states.
⃗kn, ζ, u)a G,λ1(⃗k1)· · ·a G,λn(⃗kn),(D2) where eacha G,λ(⃗k) is the Gaussian-smeared operator of Eq
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Quantum graviton scattering with definite helicities in the null surface formulation
Second-order quantum graviton scattering in the null surface formulation yields perturbatively finite amplitudes that reproduce the s-channel Weinberg tree-level result in the Poincare limit via on-shell intermediate gravitons and Gaussian-smeared states.