  The electron-graviton interaction can be described in terms of the
gravitational form factors of the QED energy momentum tensor. Here we focus on
the form factor D(t), and we examine its properties and its interpretation in
terms of internal forces at one-loop accuracy in QED. We perform the
calculation by keeping separate the contributions due to the electron and the
photon parts of the energy momentum tensor. We also study the case of a nonzero
photon mass. Furthermore, we discuss similarities with and differences to the
form factor D(t) of hadronic bound states.

High Energy Physics - Phenomenology;High Energy Physics - Theory