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Search for unstable sterile neutrinos with the icecube neutrino observatory
Journal article   Open access

Search for unstable sterile neutrinos with the icecube neutrino observatory

R. Abbasi, M. Ackermann, J. Adams, J. A. Aguilar, M. Ahrens, J. M. Alameddine, A. A. Alves, N. M. Amin, K. Andeen, G. Anton, …
07 Oct 2022
PMID: 36269964
url
https://doi.org/10.5445/ir/1000151581View
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Abstract

neutrino/mu: atmosphere Subatomic Physics IceCube Physics, Multidisciplinary sterile [neutrino] FOS: Physical sciences High Energy Physics - Experiment mixing angle: measured [neutrino] coupling constant neutrino: sterile Science & Technology observatory 530 decay: model neutrino: model hep-ex Subatomär fysik neutrino: decay model [decay] SPECTRUM High Energy Physics - Experiment (hep-ex) stability experimental results CONVERSION Physics and Astronomy oscillation [neutrino] General Physics and Astronomy neutrino: mixing angle: measured neutrino: oscillation decay [neutrino] atmosphere [neutrino/mu] neutrino: mass difference model [neutrino] mass difference [neutrino] Physical Sciences Physics
Physical review letters 129(15), 151801 (2022). 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 $ν_μ$ 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 $Δm_{41}^2$ = $6.7_{-2.5}^{+3.9}$ eV$^2$, sin$^2 2θ_{24}$ = $0.33_{-0.17}^{+0.20}$, and $g^2$ = $2.5π ± 1.5π$, 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. Published by APS, College Park, Md.

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Collaboration types
Domestic collaboration
International collaboration
Web of Science research areas
Physics, Multidisciplinary
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