Speaker
Adam Freese
(Jefferson Lab)
Description
Light front densities have long been promoted as constituting true internal hadron densities. A big selling point is that light front uniquely permits transverse localization and a clean separation between the barycentric and internal degrees of freedom many-body systems, both of which follow from the light front's realization of the Poincaré group's Galilean subgroup. Rather than eliminating relativistic effects, the Galilean subgroup shuffles them into the longitudinal direction, ultimately introducing distortions into the light front densities. In this talk, I show that light front current and EMT densities inevitably retain artifacts of the barycentric wave packet.
Author
Adam Freese
(Jefferson Lab)