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Journal Article

Are There Sterile Neutrinos at the eV Scale?


Schwetz,  Thomas
Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society;

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Kopp, J., Maltoni, M., & Schwetz, T. (2011). Are There Sterile Neutrinos at the eV Scale? Physical Review Letters, 107(9): 091801, pp. 1-5. doi:10.1103/PhysRevLett.107.091801.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0014-46B8-E
New predictions for the antineutrino flux from nuclear reactors suggest that reactor experiments may have measured a deficit in this flux, which can be interpreted in terms of oscillations between the known active neutrinos and new sterile states. We perform a reanalysis of global short-baseline neutrino oscillation data in a framework with one or two sterile neutrinos. While one sterile neutrino is still not sufficient to reconcile the signals suggested by reactor experiments and by the LSND and MiniBooNE experiments with null results from other searches, we find that, with the new reactor flux prediction, the global fit improves considerably when two sterile neutrinos are introduced.