Quantum gravity corrections from superstring theory

Details Quantum gravity corrections from superstring theory Quantum gravity corrections from superstring theory

Sep 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989nuphb.323..585g&link_type=abstract

Nuclear Physics B, Volume 323, Issue 3, p. 585-613.

Physics

Nuclear Physics

17

Scientific paper

Starting from an exact integral representation of the superstring scattering amplitude at two loops for bosr bosonic massless external states, we evaluate its asymptotic behaviour in the limit of high energy and small momentum transfer. By using a simple compactification scheme we study the case of four-dimensional space-time. We find a term of a rescattering eikonal form due to multigraviton exchanges in the t-channel, and a term like a Schwarzschild correction due to the interaction among the exchanged gravitons. We find also some infrared divergences, peculiar to D = 4.
Permanent address: Physics Department, Graduate School, Chinese Academy of Sciences, P.O. Box 3908, P.R. China.

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