Completely dark photons from gravitational particle production during the inflationary era
Completely dark photons from gravitational particle production during the inflationary era
A bstract Starting with the de Broglie-Proca Lagrangian for a massive vector field, we calculate the number density of particles resulting from gravitational particle production (GPP) during inflation, with detailed consideration to the evolution of the number density through the reheating. We find plausible scenarios for the production of dark-photon …