Short Distance Contributions to Graviton-Graviton Scattering: Matrix Theory versus Supergravity

Abstract

We study graviton scattering in the presence of higher dimensional operators - particularly, R^4 - arising from loop effects. We find that the results do not correspond to any known terms in the effective action of Matrix Theory, thus lending support to the idea that the finite N Matrix Theory has no simple relation to supergravity with large compactification radii.

13 pages, LaTeX file with 3 Postscript figures. Uses epsf.tex and fps.sty macros. Revisions of v2: some comments in the end of section 3 have been removed