Semi-Annihilation of Fermionic Dark Matter
arXiv:2206.05811 · doi:10.1103/PhysRevD.107.015020
Abstract
The continued non-observation of events emanating from dark matter (DM) annihilations in various direct and indirect detection experiments calls into question the mechanism for determining the relic density of a weakly interacting massive particle. However, if the relic density is determined primarily by a semi-annihilation process, as opposed to the usual annihilation, this tension can be ameliorated. Here, we investigate a Z3 symmetric effective field theory incorporating a fermionic dark matter that semi-annihilates to right-handed neutrinos (RHN). The dynamics of the RHN and the impact of its late decays are also scrutinised while obtaining the correct DM relic. Finally, indirect detection bounds on the semi-annihilation cross-sections are drawn from the gamma-ray observations in the direction of Dwarf Spheroidal Galaxies (Fermi-LAT), and including the projections obtained for the H.E.S.S. and the CTA detectors.
arXiv comment22 pages, 7 figures
References in corpus (41)
- An Introduction to PYTHIA 8.2
- Searching for Dark Matter Annihilation from Milky Way Dwarf Spheroidal Galaxies with Six Years of Fermi-LAT Data
- The Diversity and Similarity of Simulated Cold Dark Matter Halos
- Hidden vector dark matter
- Search for a Dark Matter annihilation signal from the Galactic Center halo with H.E.S.S
- Revisiting Big-Bang Nucleosynthesis Constraints on Long-Lived Decaying Particles
- Semi-annihilation of Dark Matter
- Dark Matter Annihilation to Neutrinos
- Measurements of the atmospheric neutrino flux by Super-Kamiokande: energy spectra, geomagnetic effects, and solar modulation
- Neutrino Portals to Dark Matter
- Impact of semi-annihilations on dark matter phenomenology - an example of Z_N symmetric scalar dark matter
- Scalar Singlet Dark Matter
- Intense Gamma-Ray Lines from Hidden Vector Dark Matter Decay
- Dark Matter Freeze-in Production in Fast-Expanding Universes
- DarkBit: A GAMBIT module for computing dark matter observables and likelihoods
- Co-SIMP Miracle
- Cosmic abundances of SIMP dark matter
- Sterile Neutrino portal to Dark Matter II: Exact Dark symmetry
- Indirect Detection of Neutrino Portal Dark Matter
- Deep Underground Neutrino Experiment (DUNE), Far Detector Technical Design Report, Volume II: DUNE Physics
- Impact of Semi-annihilation of Z3 Symmetric Dark Matter with Radiative Neutrino Masses
- All-flavour Search for Neutrinos from Dark Matter Annihilations in the Milky Way with IceCube/DeepCore
- A realistic model for Dark Matter interactions in the neutrino portal paradigm
- Search of Dark Matter Annihilation in the Galactic Centre using the ANTARES Neutrino Telescope
- Resonant SIMP dark matter
- Right-handed sneutrino dark matter in seesaw models and its signatures at the LHC
- Scrutinizing Right-Handed Neutrino Portal Dark Matter With Yukawa Effect
- Multiple Gamma Lines from Semi-Annihilation
- CMB anisotropy and BBN constraints on pre-recombination decay of dark matter to visible particles
- Implications of right-handed neutrinos in extended standard model with scalar dark matter
- The Semi-Hooperon: Gamma-ray and anti-proton excesses in the Galactic Center
- Search for right-handed neutrinos from dark matter annihilation with gamma-rays
- Self-heating dark matter via semi-annihilation
- Feeble neutrino portal dark matter at neutrino detectors
- Distinguishing Inert Higgs Doublet and Inert Triplet Scenarios
- Dark Matter Relic Abundance and Light Sterile Neutrinos
- Self-heating of Strongly Interacting Massive Particles
- Search for Semi-Annihilating Dark Matter with Fermi-LAT, H.E.S.S., Planck, and the Cherenkov Telescope Array
- Implications of a Dark Matter-Neutrino Coupling at Hyper-Kamiokande
- WIMP Dark Matter Hidden behind its Companion
- Semi-annihilating dark matter coupled with Majorons