Gravitino one-loop contribution to Planckian Scattering

Details Gravitino one-loop contribution to Planckian Scattering Gravitino one-loop contribution to Planckian Scattering

1992-07-31

arxiv.org/abs/hep-th/9207113v1

Nucl.Phys. B393 (1993) 79-94

Physics

High Energy Physics

High Energy Physics - Theory

15 pages

Scientific paper

10.1016/0550-3213(93)90238-K

Corrections to the semiclassical approximation in nearly forward Planckian energy collisions are here reconsidered. Starting from the one-loop superstring amplitude, we are able to disentangle the first subleading high-energy contribution at large impact parameters, and we thus directly compute the one-loop correction to the superstring eikonal. We finally argue, on the basis of analyticity and unitarity, that gravitinos do not contribute at all to the large distance two-loop ACV correction, which thus acquires a universal ``classical'' interpretation.

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