Neutrino Portal to FIMP Dark Matter with an Early Matter Era

Abstract

We study the freeze-in production of Feebly Interacting Massive Particle (FIMP) dark matter candidates through a neutrino portal. We consider a hidden sector comprised of a fermion and a complex scalar, with the lightest one regarded as a FIMP candidate. We implement the Type-I Seesaw mechanism for generating the masses of the Standard Model (SM) neutrinos and consider three heavy neutrinos, responsible for mediating the interactions between the hidden and the SM sectors. We assume that an early matter-dominated era (EMDE) took place for some period between inflation and Big Bang Nucleosynthesis, making the Universe to expand faster than in the standard radiation-dominated era. In this case, the hidden and SM sectors are easily decoupled and larger couplings between FIMPs and SM particles are needed from the relic density constraints. In this context, we discuss the dynamics of dark matter throughout the modified cosmic history, evaluate the relevant constraints of the model and discuss the consequences of the duration of the EMDE for the dark matter production. Finally, we show that if the heavy neutrinos are not part of the thermal bath, this scenario becomes testable through indirect detection searches.

39 pages, 11 figures, references added, typos corrected

References in corpus (11)

• Secluded WIMP Dark Matter
• Reheating in Inflationary Cosmology: Theory and Applications
• The Dawn of FIMP Dark Matter: A Review of Models and Constraints
• Gamma Ray Signals from Dark Matter: Concepts, Status and Prospects
• Co-Decaying Dark Matter
• Freeze-in Production of Sterile Neutrino Dark Matter in U(1)${}_{\mathrm{B}-\mathrm{L}}$ Model
• Ultra-cold WIMPs: relics of non-standard pre-BBN cosmologies
• Breaking a dark degeneracy: The gamma-ray signature of early matter domination
• Long-lived Light Mediator to Dark Matter and Primordial Small Scale Spectrum
• Cosmological Bounds on sub-GeV Dark Vector Bosons from Electromagnetic Energy Injection
• Decaying Dark Matter in the Supersymmetric Standard Model with Freeze-in and Seesaw mechanims

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• First-order phase transition and fate of false vacuum remnants
• Dark Matter Dilution Mechanism through the Lens of Large Scale Structure
• Non-minimally Coupled Vector Boson Dark Matter
• Scalar Multiplet Dark Matter in a Fast Expanding Universe: resurrection of the desert region
• Seesaw determination of the dark matter relic density
• Concealing Dirac neutrinos from cosmic microwave background
• From WIMPs to FIMPs: Impact of Early Matter Domination
• FIMP Dark Matter from Leptogenesis in Fast Expanding Universe
• Unitarity Bound on Dark Matter in Low-temperature Reheating Scenarios
• A model for mixed warm and hot right-handed neutrino dark matter
• Dark Matter in the Type Ib Seesaw Model
• Probing feebly interacting dark matter with monojet searches
• Testing freeze-in with axial and vector $Z^{\prime }$ bosons
• EvoEMD: cosmic evolution with an early matter-dominated era
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• Dark Sector extensions of the Littlest Seesaw in the presence of Primordial Black Holes
• Frozen-in fermionic singlet dark matter in non-standard cosmology with a decaying fluid
• Reviewing the prospect of fermion triplets as dark matter and source of baryon asymmetry in non-standard cosmology
• Freezing In with Lepton Flavored Fermions
• WIMP dark matter in bulk viscous non-standard cosmologies
• Feebly-interacting dark matter
• Prospects for the detection of Dark Matter with Long-lived Mediators in the Sun using the Southern Wide-field Gamma-ray Observatory
• Supersymmetric $\nu$-Inflaton Dark Matter
• Directional Neutrino Searches for Galactic Center Dark Matter at Large Underground LArTPCs
• Imprints of an early matter-dominated era arising from dark matter dilution mechanism on cosmic string dynamics and gravitational wave signatures
• Fingerprints of freeze-in dark matter in an early matter-dominated era
• Constraining light dark matter in vector-scalar portals with COSI and AMEGO-X
• Searching for dark radiation at the LHC
• Indirect Searches for Secluded Dark Matter
• Sterile neutrino portals to Majorana dark matter: effective operators and UV completions