Microscopic unitary description of tidal excitations in high-energy string-brane collisions

Abstract

The eikonal operator was originally introduced to describe the effect of tidal excitations on higher-genus elastic string amplitudes at high energy. In this paper we provide a precise interpretation for this operator through the explicit tree-level calculation of generic inelastic transitions between closed strings as they scatter off a stack of parallel Dp-branes. We perform this analysis both in the light-cone gauge, using the Green-Schwarz vertex, and in the covariant formalism, using the Reggeon vertex operator. We also present a detailed discussion of the high energy behaviour of the covariant string amplitudes, showing how to take into account the energy factors that enhance the contribution of the longitudinally polarized massive states in a simple way.

58 pages

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• The dark side of fuzzball geometries
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• The perturbative CFT optical theorem and high-energy string scattering in AdS at one loop
• The leading eikonal operator in string-brane scattering at high energy
• A microscopic description of absorption in high-energy string-brane collisions
• Eikonal Scattering in Kaluza-Klein Gravity
• Regge behavior saves String Theory from causality violations
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