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Publication Type: Journal article
Publication year: 2022
Book Volume: 129
Article Number: 151801
Journal Issue: 15
DOI: 10.1103/PhysRevLett.129.151801
We present a search for an unstable sterile neutrino by looking for a resonant signal in eight years of atmospheric νμ data collected from 2011 to 2019 at the IceCube Neutrino Observatory. Both the (stable) three-neutrino and the 3+1 sterile neutrino models are disfavored relative to the unstable sterile neutrino model, though with p values of 2.8% and 0.81%, respectively, we do not observe evidence for 3+1 neutrinos with neutrino decay. The best-fit parameters for the sterile neutrino with decay model from this study are Δm412=6.7-2.5+3.9 eV2, sin22θ24=0.33-0.17+0.20, and g2=2.5π±1.5π, where g is the decay-mediating coupling. The preferred regions of the 3+1+decay model from short-baseline oscillation searches are excluded at 90% C.L.
APA:
Abbasi, R., Ackermann, M., Adams, J., Aguilar, J.A., Ahlers, M., Ahrens, M.,... Zhelnin, P. (2022). Search for Unstable Sterile Neutrinos with the IceCube Neutrino Observatory. Physical Review Letters, 129(15). https://dx.doi.org/10.1103/PhysRevLett.129.151801
MLA:
Abbasi, R., et al. "Search for Unstable Sterile Neutrinos with the IceCube Neutrino Observatory." Physical Review Letters 129.15 (2022).
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