Completely Dark Photons from Gravitational Particle Production During Inflation
Cosmology and Nongalactic Astrophysics
2021-04-14 v2 General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
High Energy Physics - Theory
Abstract
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 dark matter of mass in a wide range, as low as a micro-electron volt to GeV. Gravitational particle production does not depend on any coupling of the dark photon to standard-model particles.
Keywords
Cite
@article{arxiv.2009.03828,
title = {Completely Dark Photons from Gravitational Particle Production During Inflation},
author = {Edward W. Kolb and Andrew J. Long},
journal= {arXiv preprint arXiv:2009.03828},
year = {2021}
}
Comments
39 pages, 12 plots in 8 figures; v2 - added citations, extended discussion of literature, corrected typo in Eq (5.38), Fig 7 stylistically changed, matches JHEP