Speaker
Description
String theory scattering amplitudes exhibit remarkable properties, most notably their ultraviolet softness, easily explained from a worldsheet perspective. From a target space perspective, these features arise from the infinite tower of massive excitations organized into Regge trajectories. Despite this rich structure, string amplitudes are not known in closed form beyond a few low-lying trajectories, or for light states.
In this work, we develop techniques to systematically construct states along entire Regge trajectories and compute their associated three-point amplitudes. These results offer new insight into the organization of string amplitudes at high mass and provide a step toward a more complete understanding of their target space interpretation.