Production of keV sterile neutrinos in supernovae: New constraints and gamma-ray observables
Name
PhysRevD.99.043012.pdf
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821.6 KB
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Checksum (MD5)
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Author(s)
Arguelles Delgado, Carlos A
Brdar, Vedran
Kopp, Joachim
Date Issued
February 2019
Journal
Physical Review D
Publisher
American Physical Society
Citation
Arguelles, Carlos A. et al. "Production of keV sterile neutrinos in supernovae: New constraints and gamma-ray observables." Physical Review D 99, 4 (February 2019): 043012
Version
Final published version
Abstract
We study the production of sterile neutrinos in supernovae, focusing in particular on the keV-MeV mass range, which is the most interesting range if sterile neutrinos are to account for the dark matter in the Universe. Focusing on the simplest scenario in which sterile neutrinos mix only with muon or tau neutrinos, we argue that the production of keV-MeV sterile neutrinos can be strongly enhanced by a Mikheyev-Smirnov-Wolfenstein (MSW) resonance, so that a substantial flux is expected to emerge from a supernova, even if vacuum mixing angles between active and sterile neutrinos are tiny. Using energetics arguments, this yields limits on the sterile neutrino parameter space that decrease to mixing angles on the order of sin^{2}2θ≲10^{-14} and are up to an order of magnitude stronger than those from X-ray observations. Although supernova limits suffer from larger systematic uncertainties than X-ray limits, they apply also to scenarios in which sterile neutrinos are not abundantly produced in the early Universe. We also compute the flux of O(MeV) photons expected from the decay of sterile neutrinos produced in supernovae but find that it is beyond current observational reach even for a nearby supernova.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Terms of Use
Creative Commons Attribution 3.0 unported license
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1103/PhysRevD.99.043012
