Scattering higher spins off D-branes

TL;DR

This paper investigates the scattering of higher spin closed-string states off D-branes, revealing simplifications at tree level and one loop, and analyzing high energy behavior and eikonal approximation validity.

Contribution

It provides new insights into scattering amplitudes involving higher spin states and D-branes, highlighting simplifications and high energy dynamics.

Findings

Simplifications in scattering amplitudes at tree level and one loop.

Analysis of high energy behavior in the Regge limit.

Discussion on the validity of the eikonal approximation.

Abstract

We study scattering amplitudes of higher spin closed-string states off D-branes. For states in the `first Regge trajectory' we find remarkable simplifications both at tree level and at one loop. We discuss the high energy behavior in the Regge limit and comment on the validity of the eikonal approximation in this regime.