Direct couplings of mimetic dark matter and their cosmological effects

Abstract

The original mimetic model was proposed to take the role of dark matter. In this paper we consider possible direct interactions of the mimetic dark matter with other matter in the universe, especially the standard model particles such as baryons and photons. By imposing shift symmetry, the mimetic dark matter field can only have derivative couplings. We discuss the possibilities of generating baryon number asymmetry and cosmic birefringence in the universe based on the derivative couplings of the mimetic dark matter to baryons and photons.

arXiv comment8 pages, references are updated, the version to be published in Chinese Physics C

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• Two-field mimetic gravity revisited and Hamiltonian analysis
• Hamiltonian analysis of Mimetic gravity with higher derivatives
• Coupling quintessence kinetics to electromagnetism
• Isotropic stellar model in mimetic theory
• Extensions of two-field mimetic gravity
• Matter production effects and interacting scenario within a reconstructed mimetic cosmology for late times