Abstract: An excess of gamma ray photons detected by the Fermi-LAT satellite in the direction of the center of the Milky Way and accounting for roughly 10% of the total observed photons has proven to be rich ground for theoretical investigation for over a decade. During this same time, there have been qualitative improvements in our knowledge of high-energy local … Read More

We propose a new method to regulate the motion of test masses in GR as the point particle limit of classical field equations. First, we explore the inter-relations between classical field solutions in a background metric and the Hamilton-Jacobi action for geodesic motion. We then show how to directly extract the scattering angle for a point particle from the partial wave expansion for field scattering, by … Read More