Gravitino one-loop contribution to Planckian Scattering

Abstract

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.

15 pages

References in corpus (2)

• Scattering at Planckian Energies
• Geometry of Scattering at Planckian Energies

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