keV scale ${\nu }_R$ dark matter and its detection in $\beta$ decay experiment

Abstract

We study dark matter(DM) in the model with one keV scale right-handed neutrino ${\nu }_{R1}$ and two GeV scale right-handed neutrinos ${\nu }_{R2,3}$, the $\nu$SM. We find that one of the GeV scale right-handed neutrinos can have much longer lifetime than the other when two GeV scale right-handed neutrinos are degenerate. We show that mass and mixing of light neutrinos can be explained in this case. Significant entropy release can be generated in a reheating produced by the decay of one of the GeV scale ${\nu }_R$. The density of ${\nu }_{R1}$ DM can be diluted by two orders of magnitude and the mixing of ${\nu }_{R1}$ with active neutrinos is allowed to be much larger, reaching the bound from X-ray observation. This mixing can lead to sizeable rate of ${\nu }_{R1}$ capture by radioactive nuclei. The ${\nu }_{R1}$ capture events are mono-energetic electrons with keV scale energy away from the beta decay spectrum. This is a new way to detect DM in the universe.

12 pages; references added; version to appear in PRD

References in corpus (18)

• Sterile neutrinos, dark matter, and the pulsar velocities in models with a Higgs singlet
• Dark-matter sterile neutrinos in models with a gauge singlet in the Higgs sector
• A possible symmetry of the $\nu$MSM
• A lower bound on the mass of Dark Matter particles
• Opening a new window for warm dark matter
• keV sterile neutrino dark matter in gauge extensions of the standard model
• Where to find a dark matter sterile neutrino?
• Realistic sterile neutrino dark matter with keV mass does not contradict cosmological bounds
• Constraints on the parameters of radiatively decaying dark matter from the dark matter halo of the Milky Way and Ursa Minor
• Constraints on decaying Dark Matter from XMM-Newton observations of M31
• Searching for dark matter in X-rays: how not to check the dark matter origin of a spectral feature
• Dark Matter Search Using Chandra Observations of Willman 1, and a Spectral Feature Consistent with a Decay Line of a 5 keV Sterile Neutrino
• Sterile neutrino dark matter in $B-L$ extension of the standard model and galactic 511 keV line
• Searching for dark matter sterile neutrino in laboratory
• Charged current cross section for massive cosmological neutrinos impinging on radioactive nuclei
• Interactions of keV sterile neutrinos with matter
• Probing Low Energy Neutrino Backgrounds with Neutrino Capture on Beta Decaying Nuclei
• Symmetry, dark matter and LHC phenomenology of the minimal $\nu$SM

Cited by in corpus (24)

• A White Paper on keV Sterile Neutrino Dark Matter
• The Phenomenology of Right Handed Neutrinos
• Dark Matter, Baryogenesis and Neutrino Oscillations from Right Handed Neutrinos
• Flavor structures of charged fermions and massive neutrinos
• Sterile Neutrinos as the Origin of Dark and Baryonic Matter
• Soft L_e-L_mu-L_tau flavour symmetry breaking and sterile neutrino keV Dark Matter
• Next decade of sterile neutrino studies
• Direct Detection Signals from Absorption of Fermionic Dark Matter
• Q_6 flavor symmetry model for the extension of the minimal standard model by three right-handed sterile neutrinos
• Sterile neutrino Dark Matter production from scalar decay in a thermal bath
• Possible Capture of keV Sterile Neutrino Dark Matter on Radioactive beta-decaying Nuclei
• Warm Dark Matter from keVins
• Tritium beta decay with additional emission of new light bosons
• Captures of Hot and Warm Sterile Antineutrino Dark Matter on EC-decaying Ho-163 Nuclei
• Discriminating between Thermal and Nonthermal Cosmic Relic Neutrinos through Annual Modulation at PTOLEMY
• Observation of the new emission line at ~3.5 keV in X-ray spectra of galaxies and galaxy clusters
• Signature of heavy sterile neutrinos at CEPC
• Constraining models for keV sterile neutrinos by quasi-degenerate active neutrinos
• Detection Prospects of the Cosmic Neutrino Background
• Electron events from the scattering with solar neutrinos in the search of keV scale sterile neutrino dark matter
• Magnetic dipole moment and keV neutrino dark matter
• Theoretical Overview on the Flavor Issues of Massive Neutrinos
• Probing sterile neutrino dark matter in the PTOLEMY-like experiment
• Direct detection of relic active and sterile neutrinos