Dark photon Dark Matter without Stueckelberg mass
- Resource Type
- article
- Authors
- Michele Redi; Andrea Tesi
- Source
- Journal of High Energy Physics, Vol 2022, Iss 10, Pp 1-28 (2022)
- Subject
- Cosmology of Theories BSM
Models for Dark Matter
Phase Transitions in the Early Universe
Nuclear and particle physics. Atomic energy. Radioactivity
QC770-798
- Language
- English
- ISSN
- 1029-8479
Abstract We study the scenario of dark photon Dark Matter where the mass is generated through the Higgs mechanism rather than the constant Stueckelberg mass. In this construction the dark sector contains necessarily extra degrees of freedom and interactions that lead to non-trivial dynamics including thermalization, phase transitions, cosmic string production. As a consequence the predictions of Stueckelberg theories are vastly modified, strongly depending on the couplings to curvature and on the scale of inflation H I compared to the scale f of spontaneous symmetry breaking. We find in particular that only in extreme regions of parameter space the phenomenology of Stueckelberg dark photon is reproduced. These scenarios are strongly constrained by isocurvature perturbations unless the dark sector is approximately Weyl invariant.