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Infinities within graviton scattering amplitudes

D. C. Dunbar, P. S. Norridge

hep-tharXiv:hep-th/9512084

Abstract

We present unitarity as a method for determining the infinities present in graviton scattering amplitudes. The infinities are a combination of IR and UV. By understanding the soft singularities we may extract the UV infinities and relate these to counter-terms in the effective action. As an demonstration of this method we rederive the UV infinities present at one-loop when gravity is coupled to matter.

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