Almost closing the νMSM sterile neutrino dark matter window with NuSTAR
Name
PhysRevD.95.123002.pdf
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1.35 MB
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Author(s)
Ng, Kenny C. Y.
Beacom, John F.
Hersh, Cora
Horiuchi, Shunsaku
Krivonos, Roman
Perez, Kerstin M.
Date Issued
June 2017
Journal
Physical Review D
Publisher
American Physical Society
Citation
Perez, Kerstin et al. “Almost Closing the ν MSM Sterile Neutrino Dark Matter Window with NuSTAR.” Physical Review D 95.12 (2017): n. pag. © 2017 American Physical Society
Version
Final published version
Abstract
We use NuSTAR observations of the Galactic center to search for x-ray lines from the radiative decay of sterile neutrino dark matter. Finding no evidence of unknown lines, we set limits on the sterile neutrino mass and mixing angle. In most of the mass range 10–50 keV, these are now the strongest limits, at some masses improving upon previous limits by a factor of ∼10. In the νMSM framework, where additional constraints from dark matter production and structure formation apply, the allowed parameter space is reduced by more than half. Future NuSTAR observations may be able to cover much of the remaining parameter space.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.95.123002
