Conformal Portal to Dark Matter

Abstract

We propose a new portal coupling to dark matter by taking advantage of the nonminimally coupled portal sector to the Ricci scalar. Such a portal sector conformally induces couplings to the trace of the energy-momentum tensor of matters including highly secluded dark matter particles. The portal coupling is so feeble that dark matter is produced by freeze-in processes of scatterings and/or the decay of the mediator. We consider two concrete realizations of the portal: conformally induced Higgs portal and conformally induced mediator portal. The former case is compatible with the Higgs inflation, while the latter case can be tested by dark matter direct detection experiments.

16 pages, 5 figures, version accepted by PRD

References in corpus (21)

• The Standard Model Higgs boson as the inflaton
• Results from a search for dark matter in the complete LUX exposure
• Tests of the Gravitational Inverse-Square Law below the Dark-Energy Length Scale
• Gauge Singlet Scalars as Cold Dark Matter
• Dark Matter Results From 54-Ton-Day Exposure of PandaX-II Experiment
• The Dawn of FIMP Dark Matter: A Review of Models and Constraints
• General Constraints on Dark Matter Decay from the Cosmic Microwave Background
• Thermal Dark Matter From A Highly Decoupled Sector
• Inflaton Oscillations and Post-Inflationary Reheating
• Toward (Finally!) Ruling Out Z and Higgs Mediated Dark Matter Models
• Enhancement of the Dark Matter Abundance Before Reheating: Applications to Gravitino Dark Matter
• Dark Matter and Gauge Coupling Unification in Non-supersymmetric SO(10) Grand Unified Models
• How warm are non-thermal relics? Lyman-$\alpha$ bounds on out-of-equilibrium dark matter
• Axial Dark Matter: the case for an invisible Z'
• Invisible Higgs Decay Width vs. Dark Matter Direct Detection Cross Section in Higgs Portal Dark Matter Models
• Inflation and High-Scale Supersymmetry with an EeV Gravitino
• Radiative Production of Non-thermal Dark Matter
• Z-portal dark matter
• Portal Connecting Dark Photons and Axions
• Asymmetric Dark Matter Models in SO(10)
• Disformal Dark Matter