I will review the variety of dark matter production models for sterile neutrino dark matter and their connection to structure formation and X-ray line detection, including the candidate 3.5 keV line. Structure formation continues to constrain dark matter to be increasingly cold, yet puzzles remain in galactic substructure. A few searches have claimed constraints on the presence of a dark...
The KATRIN (Karlsruhe Tritium Neutrino) experiment investigates the energetic endpoint of the tritium beta-decay spectrum to determine the effective mass of the electron anti-neutrino. The collaboration reported its first result in fall 2019, publishing the best limit up-to-date on neutrino mass from direct measurement.
The TRISTAN project aims at detecting a keV-sterile neutrino signature...
The HUNTER experiment (Heavy Unseen Neutrinos from Total Energy-Momentum) is a laboratory-based search for sterile neutrinos with sensitivity to the 20-280 keV mass range. The sterile neutrino mass will be reconstructed through precise measurement of the energy and momentum of the products in an electron capture decay of 131-Cs to determine the "missing" mass. Two reaction-microscope...
Sterile neutrinos, which could provide an elegant solution to the puzzle of the observed active neutrino masses and mixing, are among the most well-motivated dark matter candidates, with astrophysical X-ray observations offering the best opportunity for discovery. The NuSTAR X-ray observatory’s broad energy range and wide-angle aperture for unfocused photons has allowed for leading...