Gravitational renormalization of quantum field theory
arXiv:0806.0501 · doi:10.1142/S0217751X12501862
Abstract
We propose to include gravity in quantum field theory non-perturbatively, by modifying the propagators so that each virtual particle in a Feynman graph move in the space-time determined by the four-momenta of the other particles in the same graph. By making additional working assumptions, we are able to put this idea at work in a simplified context, and obtain a modified Feynman propagator for the massless neutral scalar field. Our expression shows a suppression at high momentum, strong enough to entail finite results, to all loop orders, for processes involving at least two virtual particles.
Latex, 14 pages, 4 figures. Final version to appear in IJMPA
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